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While academic researchers have proposed various theories for managing risk and uncertainty in construction projects, most of the propositions are conceptual in nature and based on analytical modelling approaches rarely used in practice. This research was triggered by an observation in which a R1·5 billion (∼US$100 million) fast-track New Universities Project in South Africa was successfully delivered within budget despite up to 74% of the project scope not being capable of being priced by the contractor at the start of construction. The aim of this paper was to examine the client’s delivery-management approach used to manage uncertainty and deliver within budget successfully. The evidence from document analyses and interviews with the client delivery-management team members shows that setting a rigorous control budget, designing to the budget, working collaboratively, disciplined management of the control budget and continuous value engineering were the key client management techniques used to manage the high degree of uncertainty and deliver the project within budget successfully. Given that these are client-led delivery-management issues, the findings fill an important gap in the knowledge and understanding of how infrastructure project outcomes can be significantly improved on when the client functions as the leader of the infrastructure delivery process.

Fast track construction with enhanced quality, sustainable and environment-friendly methods and materials are much sought after in the construction industry. Insulated concrete form (ICF) is an evolving technique that could satisfy the present demand of the construction industry. ICF is a composite of concrete and expanded polystyrene (EPS), which enhances the insulation and other mechanical properties to the building. The objective of this study is to explore the compressive and flexural characteristics of EPS and ICF blocks under standard loading condition and evaluate the thermal performance of ICF panels using R-value. Plastic deformation, failure and energy absorption behavior of EPS and ICF blocks are assessed using compressive stress-strain profiles. The experimental results show that the plastic deformation of the ICF block is 78 times higher than plain concrete block. The presence of EPS in ICF helps to change the failure nature of sandwiched concrete from brittle to ductile, which is quantified in terms of plastic deformation. A simplified experimental approach is proposed to study the thermal performance of ICF panel using R-value. The proposed design is effective to measure the thermal resistance of wall panels and the obtained R-value of the ICF panel is 5.22 m2.K/W which is 7.9 times higher than the plain concrete panel. The higher R-value of ICF provides greater insulation to the building by keeping the controlled temperature for longer periods. This thermal insulation behavior of ICF reduces power demand and makes the building more energy-efficient. Thus the ICF system helps in sustainable building construction by affording high thermal insulation with improved structural strength.

The current scenario in India has restricted horizontal growth, especially in cities, the crystal rectifier for building construction to the vertical growth. India's construction industry is an important development indicator, as it creates opportunities for investment across numerous connected sectors. Today, fast track construction is a fast-growing economy, with rising costs and therefore time savings in construction can compensate for vital proportions of overall construction costs. This paper presents a study on time and cost-wise feasibility between two construction systems, Structural Steel and Concrete, precast concrete construction. A case study considered for this work is a 16-storied building, which consists of six stilt floors meant for parking, and the rest of floors are meant for office space. The Primavera P6-2017 used for time scheduling and the optimum time required at different stages of all these two buildings are calculated. The cost of structure is calculated considering the above two systems of construction and details presented here with. On the time basis, the composite structure will be an option for the client as it will reduce the time about 33 days and coming to the cost point of view structural steel is a bit of cost material. While coming to the precast structure it may take more than the time required for the composite structure, but cost analysis reveals that it will be economical than composite structure.

Modular prefabrication technology promotes off-site manufacturing of modules and on-site assembly by improving the construction efficiency, safety and productivity. However, the joining of individual modules needs special connectors that must be fast to install and robust enough to ensure structural integrity. The restrictions on the overall dimension and weight of the modules for lifting and transportation provide the impetus to develop a more efficient structural module system that is lightweight and fast to install. This paper discusses the design and construction challenges of existing modular construction of high-rise buildings and provides solutions to resolve these challenges. A novel lightweight steel-concrete composite system is introduced to reduce the weight of the module without compromising the strength and stiffness. To increase the available headroom, a slim floor system is proposed to reduce the floor-to-floor depth and ensure the integration of buildings service within the structural zone. High strength concrete is used as an infill material for tubular columns to maintain the same column size to avoid complex joining details involving modules with different column sizes. Long-span steel concrete composite modular system is proposed to reduce the number of joints and columns for fast track construction. A fast and easy joining technique is developed to ensure fast installation of modules. Inter-module joints are modelled as semi-rigid to capture the realistic joint behaviour in global analysis to ensure the structural integrity and overall stability of the building.

Issue of mobility is of the greatest concern across the world and is based on end-user requirement. Fast track implementation and innovative schemes are required. Transport innovation can be categorized as Innovations for developing Infrastructure Innovations for developing vehicular systemsProjects including different urban context require innovative design/construction technique specific to site requirement and improve mobility. The paper deals with innovative design to reduce cost and time and focuses on technology and knowledge fusions. Use of steel-concrete superstructure has now become de rigueur as highly automated fabrication and transport logistics have improved throughout India. Precast segmental construction has been shown to be not only for glamorous and highly visible urban projects such as flyovers, but also for pedestrian subways, that would go typically unnoticed. Only the innovator knows how the innovation came to be that serves the society by reducing implementation duration and allows greater surface mobility. These are some of the items that are described in this paper.It also focuses on innovations that include fast track implementation in transportation sector for infrastructure and with a brief on system. Case study/studies are presented to discuss concept, design and construction in improving Indian urban mobility.

The 1915 Canakkale Bridge is a world record 2023 m main span suspension bridge crossing the Canakkale Strait in Turkey to connect Europe and Asia. Detailed design has been prepared in a challenging short period of 12 months. Significant design challenges for aerodynamics, ship collision, seismic and poor soil conditions have in combination with the very tight design and construction schedule significantly impacted alignment and articulation of the bridge. To accommodate the windy location, the bridge girder is designed as a twin-box steel girder for the purpose of a wind-resistant design. The dense ship traffic including the world largest ships and a massive grow rate for the strait has governed the design of the deep water tower foundations. The bridge situation in a seismically active region has further affected significant parts of the substructure design. Seismic hazard and difficult geological site conditions impose tremendous challenges to the bridge design. Finally, the tight construction schedule has conditioned the design solutions to accommodate fast track construction. The paper summarize the engineering approach, design decisions regarding alignment and articulation, design challenges and results obtained for the detailed design of the bridge.

This report describes the technology of using precast concrete panels for the repair of concrete pavements. The objective of the study was to assess the state-of-technology and to identify implementation challenges. The repair of concrete pavements using precast concrete panels may be an effective alternative to cast-in-place repairs, because it can reduce construction time and provide durable pavements. Construction costs of repairs using precast panels are typically higher than the cost of repairs using cast-in-place paving with high-early-strength concrete. However, the repairs using precast panels have the potential to be faster and of higher quality. The greatest potential for using precast repairs is for situations where identical precast panels can be used at different repair locations. Successful pavement repairs using precast panels carried out under time constraints require close cooperation between the facility owner, the contract administrator, and the contractor. All factors influencing the opening of the facility to traffic must be taken into account and coordinated accordingly. Current technologies for placement of precast panels use cementitious materials or polyurethane foam beneath the slab to ensure full contact/support with the underlying substrate. Repairs using precast panels depend on material and construction quality. As always, there is risk associated with the use of new technological procedures that are not in routine use and do not have an established long-term history. Keyword: - Precast Airport, ANSYS, Airport runway, Fast track construction.

Architectural planning, engineering, and building are the major areas in the complex, process-driven, field of construction. When it comes to large housing projects in contemporary times, the speed of construction is given paramount importance. Among the emerging technologies in mass housing projects, formwork system happens to be the favourite for two reasons: completing the project in less time and obtaining good concrete finishing without change in the investment. Thanks to the phenomenal rise in building of residential, commercial, and industrial buildings and structures, formwork system is in great demand. Formwork system also owes its great demand due to record building of mega infrastructure projects such as transport infrastructure (R&B), water resources engineering works, sports buildings, stadiums, and so on. Fast-track construction largely depends on formwork system. For example, Mivan, a modern method consisting of an aluminium-based formwork system, is found widely used in the building of housing units and mass residential projects. Suitable to Indian conditions for its low maintenance feature and cost-effectiveness, it is aluminum formwork that can be tailormade to suit various requirements. This paper attempts to compare the technology cost of aluminium-based Mivan formwork with that of conventional construction formwork technology. It works on the hypothesis that Mivan technology is more cost-effective, qualitatively superior, and time-saving as compared to conventional formwork technology.

The aim of this research is to explore the quality management methods adopted by contractors in fast-track construction projects by identifying the challenges experienced by the contractors and how these challenges are mitigated. To achieve the study objectives, a qualitative case study research design was applied using the narratives, in form of interviews, extracted from the contractors, clerk of works, quantity surveyors and project managers. The case studies were from projects in East London, Queenstown and Aliwal North in the Eastern Cape Province of South Africa. The findings from the study suggest that majority of those interviewed have an understanding of the concept of fast-track construction. The study also discovered that the most essential quality management methods adopted by contractors in fast-track construction were checklist, design-build, schedule compression technique, quality control plan, and Plan-Do-Act-Check methods. The study concludes that the fast-track construction approach can aid construction projects to be completed on time without jeopardising the quality standard. However, the contractors need to be meticulous in the application of the fast-track construction approach considering the challenges inherent therein.

Escalating demand for land and high rise construction leads to augmentation of lighter construction. Abating total dead load of the structure is a primal need in earthquake prone areas. In the past few decades composite panels consisting of hollow honeycombed structure have been used as a filling material in many structures. Due to ease in construction and availability, it can be used in disaster struck areas for fast track construction. It light weight makes it a viable choice for construction in seismic zones, which leads to lesser damage and loss of life compared to convectional construction materials. The sandwich panel is a composition of weak core material bonded with stiffer panel on both ends. It has low density and high energy absorption hence used as energy absorbers of high efficiency. In the present study, strength assessment of composite panels is carried numerically and validated experimentally. Numerical simulation using finite element (FE) model is carried out to understand deformation patterns under impact loading. Two tests for assessment of composite panels under impact and bending loads are carried out. Peak load and energy absorption characteristics are established. Through critical observation it was found that type of loading and aspect ratio plays an important role in determining usage of composite panels as structural components in disaster mitigation scenarios.

New fast track construction projects worth more than $100 billion are being implemented in Makkah to improve services being rendered to millions of pilgrims who come for Hajj and Umrah. The new development projects in Makkah, including largest expansion of the Grand Mosque. The time factor has become increasingly as an outstanding requirement on this construction projects. In the present work, the question "acceleration of construction projects" is moved in the center. Consequently, innovative structures, procedures and techniques are required for a time-oriented project management; consistently and purposefully focus on the reduction of process time and not to shrink back from entirely new, unfamiliar processes. so recommendations for the efficient management of construction projects always need to be developed taking into account the specific objectives and framework. This article discusses also the deterministic method, the simplified stochastic method and the application of the Monte-Carlo simulation as a stochastic method. With increasing of level of detail of the information content of the project and increases the calculation effort with the result that the range of the construction time decreases, thus the accuracy increases. Based on this range, finally the construction time of the building as well as the part times for the individual construction phases are determined.

This paper undertakes a critical case analysis of the process and outcomes of the Competition Commission (CCSA) Fast Track Construction Settlement Project relative to the mandates of the CCSA and the Construction Industry Development Board (CIDB). The study reviews the information from the CCSA’s settlements, analysing the breakdown by private and public projects, type of project and the nature of bid-rigging. It provides an assessment of the practices involved and considers the cooperation that is required for the successful implementation of large infrastructure projects and how these can be organized in a way that ensures rivalry while enabling co-operation. The paper further reviews the barriers to entry, and the complementary measures that can be taken to ensure greater effective rivalry and participation. Interventions that could be necessary at the regulatory, procurement and firm level to ensure that the construction sector charts a new sustainable competitive path are highlighted.

The project of Bangalore–Hosur elevated expressway comprises 10 km of elevated viaduct, a complex traffic interchange, two flyovers, several vehicular underpasses and pedestrian underpasses (VUPs a...

Fast-track construction projects have become more popular in recent years in response to growing industry demand. By allowing downstream construction activities to start with incomplete information from upstream design activities, fast-tracking (through overlapping) allows for shorter project duration at the expense of potential rework. This leaves practitioners with the challenge of determining the optimal fast-tracking strategy to meet project schedule requirements while avoiding excessive amounts of rework. This paper presents an optimization-based model that serves as a decision support tool in scheduling fast-track construction activities. The model takes into consideration information exchange between upstream and downstream activities and uses the concepts of sensitivity and evolution to maximize the net benefits of fast-tracking. The model is illustrated on an ongoing construction project, which was analysed under various overlapping scenarios. The results indicate substantial time savings depending on the speed of evolution and sensitivity. The project schedule can be shortened by up to 50 days without causing excessive amounts of rework.

A fast-track project delivery strategy is designed to leverage the ability to execute the design, procurement, and construction phases simultaneously to substantially reduce the overall project duration. The successful execution of the design phase in fast-track projects is especially challenging because the concurrent execution of design and construction interferes with the inherently iterative nature of the design process. In this research, it was hypothesized that a correlation exists between the use of some of the Construction Industry Institute (CII) best practices and the performance of design phase in fast-track projects. Analysis of the performance of the design phase in 31 fast-track projects revealed a statistically significant correlation between performance of the design phase and front-end planning, alignment, constructability, and change management. The results of quantitative analysis are supported by qualitative analysis of data, opinion of experts from industry, and academia. The ...

South Africa embarked on an accelerated infrastructure development program in preparation of the 2010 FIFA World Cup. This paper describes the structural aspects and the construction of five of ten...

The Bridge Technical Committee of PCI Northeast has recently developed a standard for a new beam called the Northeast Extreme Tee (NEXT) Beam. The goals of this new section are to provide a fast construction option for variable width bridges with spans up to 90 ft. The section resembles a standard double-tee except that the stems are wider to handle the moment and shear demand for bridge loads. The top flange of the beam is thin and is intended to provide formwork for a cast-in-place concrete deck, which is intended to save substantial time during construction. The beam was designed to be easy to fabricate, which will inevitably lead to lower bridge costs. This article focuses on the Committee's work in developing the beam and summarizes the design criteria and how the Committee accomplished those goals.

This paper presents a case study of the construction of a partially pre-stressed multi-storey offi ce block in Adelaide, Australia. The designers and construction managers faced numerous issues involving the construction speed and performance of the nine storey building, in particular the performance of the two-way partially pre-stressed suspended slabs. The planned construction period was an absolute minimum due to a contract for early occupancy and high daily costs of construction equipment. Excessive deflections of the 9.6 m 8.4 m 200 mm thick slabs were a concern for this fast-track construction. This situation created some significant issues to ensure satisfactory construction speed and acceptable deflection levels. This paper discusses these issues while also explaining and documenting the steps taken to obtain the final solution. A large collection of data from the construction process is presented. An emphasis is placed on the material properties of the concrete slabs, namely compressive strength (fc) and modulus of elasticity (Ec) development over time, due to their direct effect on the construction timeline. The effects of concrete curing conditions on material property development are also addressed. Lastly the outcomes and performance of the slabs, namely construction time and slab deformations, are presented.

This study discusses five bridges on I-80 in Utah that were replaced in the summer of 2008 by using accelerated bridge construction methods. Each superstructure was built off site and moved into place with self-propelled modular transporters. The bridges were instrumented and monitored during the moving process to investigate the effects of moving an entire superstructure into place. Collected data were analyzed to find the level of stress each superstructure experienced during lifting, moving, and placement of each bridge. Support conditions for these bridges changed considerably. During construction and when permanently placed, they were simply supported structures. During transport, the lift points were in the interior of the bridges, resulting in cantilevered ends and considerable stress reversals in the entire bridge. A two-dimensional analysis was done using the dead load of the structure to find the initial stresses in the superstructure when supported on temporary abutments. The measured change in stress resulting from lifting was compared with calculations. The difference between the two stresses was defined as the lifting stress in the superstructure. Dynamic stresses incurred as a result of bridge movement are determined and compared with recommendations.

The need for accelerated bridge construction (ABC) arises from the increases in traffic congestion over the past few decades and the corresponding costs and safety issues manifest in many forms, including exposure of workers to traffic hazards and waste of time caused by delays. Prefabricated bridge components are in increasing demand for ABC. Precasting eliminates the need to form, cast, and cure concrete in the work zones, making bridge construction safer and improving quality and durability. Precast bridges consisting of pretensioned girders, post-tensioned spliced girders, trapezoidal open-box girders, and other types of superstructure members are often used for ABC; however, bridge engineers are concerned about the durability and performance of bridges made of precast members in areas of high and moderate seismicity. Starting in 2008, the Washington State Department of Transportation (DOT) initiated a practice development and implementation for ABC. Washington State DOT has established a task force headed by an ABC advisory committee to develop standards, guidelines, and key policies for implementing structure design for ABC.

As part of the rebuilding efforts after Hurricane Katrina, the Mississippi Department of Transportation awarded a design–build contract for the replacement of the 2.1-mi-long US-90 bridge spanning Bay St. Louis. With a January 25, 2006, start date, the deadline for opening two lanes of traffic was May 16, 2007, followed by a February 15, 2008, deadline for opening the entire bridge. The bridge was constructed as two separate structures except for the navigation unit, where the deck and substructure are continuous between the eastbound and westbound structures. To allow for such an aggressive construction schedule, several concepts were used. Plans were delivered in stages to allow construction to proceed before the final submittal. The use of precast components including girders, piles, and capbeams was maximized. Pile bents to a height of 75 ft above fixity were used, with no battered piles. The pile and girder sections were varied to allow for utilization of more precast fabricators. Precast, prestressed piles, ranging in length from 50 to 164 ft, form the bridge foundations of the pile bents (24- and 36-in. piles) and waterline footings (30-in. piles). Typical superstructure elements consist of BT-78 girders (maximum span of 154 ft) and AASHTO Type IV girders (maximum span of 112 ft). A spliced haunch girder system with a 250-tt main span and 200-ft end spans was implemented at the navigational channel to satisfy the vertical and horizontal clearances.

The use of design-build project delivery in the public sector has increased rapidly since the early 1990s due to its advantages over traditional delivery methods, particularly in terms of shortening the overall project duration. Fast-track approaches are being applied to design-build projects to achieve the optimum schedule durations. While both fast-track projects and design-build project have been researched separately in the past, there is little published research on how they are truly integrated. Likewise, the research has shown the merits of partnering in design-build and fast-track projects separately, but not in an integrated model. The purpose of this study is to develop a fast-track partnering process model (FTPPM) that combines the fast-track approach with the partnering concept. The model is based on the analysis of the factors that influence successful fast-track processes. Seven key success vehicles were discovered using the factor analysis method. The FTPPM is composed of the preparation stage, the fast-track workshop stage, and the detailed design and construction stage. The activities for each stage for fast-track implementation are developed in consideration with seven key success vehicles for fast-track projects.

The end bents of an existing bridge located west of Lake Wales, Florida, experienced significant settlement, leading to concern about its stability. A detailed foundation inspection attributed the settlement to deterioration of the existing timber piles. The bridge was closed to traffic until both end bents could be remediated. An adjacent bridge handled both directions of traffic during the closure. The geotechnical contractor proposed a solution of micropiles installed through both end bents to restore the bridge's capacity. Timing was a critical component of the remediation work. The micropile program consisted of the use of rotary drilling techniques to install 20 micropiles through the end bents to a depth of 30 ft. The tops of the micropiles were bonded to the end bent pile caps. A load test was performed on a test pile installed adjacent to the existing bridge.

This essay questions received notions of the future. Are the accepted norms of economic growth and expansion the the only means by which society can develop and prosper? Rather than providing simplistic and seductive images of an intangible shiny future it rocks the cosy world of architecture with a critical blast.

In the quest to shorten project delivery time, construction professionals have the option of overlapping design and construction activities. Although time savings can be achieved by overlapping, conducting design and construction operations in a nonnatural sequence can carry significant risks. To mitigate these risks and make more appropriate overlapping decisions, concurrent engineering concepts can be used to classify upstream design activities in terms of design evolution and downstream construction activities in terms of sensitivity to upstream design changes. The focus of this work is to determine the factors that contribute to the sensitivity of construction activities. A series of semistructured interviews with experienced construction professionals show that the level of transformation, lead time, modularity, and the interaction of built components are some of the factors that determine the amount of sensitivity in construction activities to upstream design changes. These determinants provide for a quick assessment of an activity's sensitivity, which can help practitioners limit risk when planning the overlapping of design and construction activities.

In the case of fast track construction, where the design and construction phases are carried out in parallel to shorten the project delivery duration, establishing a Design Management System (DMS) to reduce the interference between design and construction activities has received more attention both from researchers and industry professionals. Especially, in investment projects like mega infrastructure projects, where the total duration of the project is directly related to the profitability of the project, effectiveness of the communication channels and strength of collaboration relations between the design and construction teams can be achieved through effective integration of the DMS with Project Management System (PMS). Within the context of this paper, a framework for DMS used in a mega infrastructure project in Korea will be introduced and its integration with the PMS using the case study will be discussed. This paper briefly demonstrates the responsibility distribution and management of design processes at different design levels. The system also argues how the information exchange is performed between design and construction teams via the integration of design and construction schedule.

Combining the design-build and fast-tracking delivery methods, this study aimed to reengineering the fast-tracking processes across both organizations of designer and constructor, so that fast-tracking processes in the design-build team can span across organizational boundaries and are composed of cooperating workflows executed in different organizations. For this purpose, two subjects are described in this study, namely, (1) fast-tracking model creation, and (2) cross-organizational process reengineering. Consequently, this research addressed a mechanism to facilitate the flexibility of cross-organizational process integration, which may assess alliance of design and construction companies for one design-build project.

Over the last 5 years the California Department of Transportation (Caltrans) has completed three experimental long-life urban freeway rehabilitation projects by utilizing a fast-track (accelerated) construction approach of around-the-clock operations under extended closure. This paper presents the fast-track rehabilitation approaches and the as-built production rates of major rehabilitation operations monitored at the three experimental projects. The monitoring results show that the contractor’s production rates varied considerably depending upon the construction logistics, material delivery and hauling methods, lane-closure tactics, and/or pavement designs being implemented. A higher production rate and a noticeable “learning-curve effect” were observed when full-width rehabilitation was compared with partial-width rehabilitation, when continuous lane reconstruction was compared with random slab replacements, and when full roadbed closures were compared with partial lane closures. Findings in this study ...

This case study paper presents an innovative fast-track approach applied to a heavily trafficked urban freeway reconstruction project in Southern California. Badly deteriorated truck lanes in both directions along a 4.5-km stretch of I-15 were rebuilt from the gravel base up. The operations, estimated to take 10 months using traditional nighttime closures, were completed in two 9-day continuous closures with round-the-clock (about 210 h for each direction) operations. This “Rapid Rehab” project adopted state-of-practice technologies to accelerate construction, mitigate traffic disruptions, and propagate project information. As a result, traffic demand through the construction work zone was reduced by 20% and the maximum peak-hour delay was reduced by 50%. The estimated benefits of accelerated reconstruction on this project included a 28% reduction in agency cost and 29% time value savings to road users, compared to the traditional approach of using repeated nighttime closures. Web surveys showed dramatic changes in public perception of the Rapid Rehab approach from initial reluctance and objection to positive support.

Information and experiences about accelerated or fast-track portland cement concrete (PCC) paving projects from the airport pavement industry are presented. The focus is on steps that can be taken during the planning phase to accelerate airfield PCC paving projects; the presentation is based on detailed case studies that were developed under an Innovative Pavement Research Foundation project. These case studies were developed from an extensive list of accelerated projects compiled from sources within the airfield paving industry, including contractors, designers, owners, and industry representatives. The key to applying accelerated paving techniques for rigid pavements lies in understanding the available strategies and in knowing when and how these strategies should be applied. A range of materials is available for accelerating pavement opening times, which is most often thought of as accelerated paving. However, beyond the simple selection of appropriate materials, many other strategies can accelerate an airfield PCC paving or repair project, including thorough planning and coordination of project activities, considering procurement and contract factors, and application of appropriate phasing and scheduling techniques during the project planning phase. Strategies addressing design, construction, and ancillary issues are included in the Accelerated Practices for Airfield Concrete Pavement Construction final documents.

The rapid economic development such as now day, it need a construction method that may provide a facility faster and less cost. Therefore, fast track method has been widely applied in project management as happened in Qunci Villas Project at Lombok and Putri Naga Komodo Project at Loh Liang of Komodo Island. Fast track construction method has potential risks that can interfere the success of the project. This study aims to identify the risks, especially the mayor risk, to formulate the mitigation action, and to determine the risk ownership. This study was conducted using qualitative descriptive method by identifying the risks arising during the implementation of the fast track method on Qunci Villas and Putri Naga Komodo Projects through the study of literature, brainstorming, interview using questionnaires to those who knew or were involved in the project. So the frequency and magnitude of the consequences of each risk can be known. Then the risk assessment can be conducted to determine the mayor risk and the minor risk. Then determining mitigation action for the mayor risk to reduce the negative impact that may arise. Then allocating the risk ownership in other to the mitigation action can be handled properly. The risk identified totaled 25 risks consisting of : 1 risk (4%) which was medium risk rating, 6 risks (24%) which were high risk rating, and 18 risks (72%) which were extreme risk rating. The mayor risk amounted to 24 risks (96%). The mayor risk which were high risk rating consisting of : 1 planning risk, 3 technical risks, 1 project risk and 1 criminal risk. While mayor risk which were extreme risk rating consisting of : 5 technical risks, 10 project risks, 2 financial risks, and 1 human risk. Mitigation action were handled by reducing likelihood and consequence. The most risks ownership were allocated to the contractor.

As an asphalt concrete demonstration project implemented under the California Department of Transportation's Long-Life Pavement Rehabilitation Strategies program, a 4.4 km stretch of Interstate-710 I-710 in Long Beach was successfully rehabilitated during eight repeated 55-h extended weekend closures using around-the-clock construction operations and counterflow traffic. This case study documented the accelerated rehabilitation process, assessed traffic impacts, and compared collected productivity data. Compared to the productivity rates of traditional nighttime closures, the 55-h weekend closures effectively reduced the construction duration and the overall traffic inconvenience. Noticeable improvement "learning-curve effect" in the contractor's production rates was observed as the weekend closures were repeated. As a result of a significant 38% traffic demand reduction through the work zone, the traffic impact of construction closures was tolerable to the extent that traffic was in free-flow condition throughout the highway network. This case study will be useful for transportation agencies and contractors in developing integrated construction and traffic management plans for urban freeway rehabilitation projects to maximize pavement life expectancy and construction productivity while minimizing agency and road user costs.

The Ohio Department of Transportation (ODOT) created Strategic Initiative Number 9 to “build bridges smarter, faster and better.” One project undertaken by ODOT was to use a precast, post-tensioned slab bridge in place of a cast-in-place slab. To accommodate school schedules and a festival, the bridge was to be completed in 16 days. However, the bridge was actually completed in 19 days. Delays were due to weather, equipment problems, and confusion over plans and specifications. Contributing to the success of the project was the effective partnering between ODOT and the contractor, along with a high level of upfront planning. However it is necessary to address problems such as the lack of contingency plans and some unexpected issues that were overlooked in the planning phase.

This case study presents an innovative fast-track reconstruction approach applied to a heavily trafficked Long-Life (30-plus years) Pavement Rehabilitation Strategies (LLPRS) project on I-15 in Devore in Southern California. A 4.5-km stretch of badly damaged concrete truck lanes was rebuilt over two 215-h (approximately 9-day) periods with one-roadbed full closures with counterflow traffic and around-the-clock (24 h per day/7 days per week) construction operations. The same project would have taken 10 months to complete with traditional nighttime closures. State-of-practice technologies were adopted on this Rapid Rehab project to accelerate construction, mitigate traffic disruptions, and propagate project information. From the initial planning and design stages, engineers used CA4PRS (Construction Analysis for Pavement Rehabilitation Strategies) software incorporated with traffic simulation models to develop an optimal and economical rehabilitation scenario. Postconstruction data validated the preconstruction analysis and simulation estimates of productivity and traffic delays. Because of the implementation of an Automated Work Zone Information System and proactive public outreach, a 20% reduction in traffic demand through the construction work zone was achieved and thereby reduced the maximum peak hour delay to a “tolerable” level. Surveys on the project website showed dramatic changes in public perception of the Rapid Rehab extended closures approach from initial reluctance and objection to positive support. Advantages of using this method of fast-track accelerated highway reconstruction included less traffic disruption for the traveling public, longer (more than 30 years) pavement life expectancy, improved safety for motorists and workers, and reduced agency cost compared with the traditional approach using repeated nighttime closures.

The California Department of Transportation is rehabilitating or reconstructing deteriorated urban freeways using long-life (30+ years) strategies. These pavements were constructed between 1955 and 1970 with design lives of 20 years. This paper summarizes pre-construction analysis of the fast-track pavement reconstruction on Interstate-15 (I-15) at Devore which used two one-roadbed continuous (about 210 hours) closures with round-the-clock (24/7) operations. The integrated analysis concluded that the one-roadbed continuous closures are the most economical scenario when compared to traditional nighttime or weekend closures from the perspective of schedule, delay, and costs. The pre-construction was validated with as-built construction and traffic performances monitored during construction. The construction management plan – including contingency, incentives, and CPM schedule – was developed utilizing the Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS) computer model. The results of this planning study are useful for transportation agencies in developing highway rehabilitation strategies that balance the maximization of construction productivity with a minimization of traffic delay.

This paper introduces an innovative approach to development of construction and traffic management plans for the I-15 Devore project, a fast-track urban freeway reconstruction project with high traffic volume in Southern California. The goal of this approach is to determine the most economical reconstruction closure scenario by integrating construction schedule, traffic delay, and agency cost. Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS) software was used for scheduling analysis. The demand-capacity model based on the Highway Capacity Manual, and macroscopic and microscopic traffic simulation models were utilized for traffic delay analysis. Based on these analyses, the California Department of Transportation decided to implement eight 72 h weekday closures with round-the-clock operations for this reconstruction project. This was found to be more beneficial for both the agency and the traveling public than the alternative of: (1) 55 h weekend, (2) 10 h nighttime, or (3) one-time co...

This paper introduces an integrated approach to the development of construction and traffic management plans for the reconstruction of high-volume urban freeways. The Devore project, which rebuilds a 4.2 km stretch of the deteriorated concrete pavement (truck lanes) on Interstate-15 (I-15) in San Bernardino County in southern California, is used as a case study. Alternative closure timing, closure duration, and number of closed lanes were compared to identify the best rehabilitation strategy for the Devore reconstruction project. The perspectives of construction schedule, traffic inconvenience (road user cost and maximum delay), and agency costs were considered. The analysis concluded that full closure of one roadbed with counter-flow traffic during repeated three or four continuous weekdays, utilizing round-the-clock reconstruction operations, was the best strategy for both the public and the sponsoring agency. A delay in the start of construction from Spring to Fall 2004 is expected to cause a 5% seasonal traffic increase, which will result in a $4.5 million increase in road user cost and a 20% increase in maximum queue delay per closure.

A 25 kilometer section of the I-15 freeway crosses the metropolitan region of Salt Lake City, Utah. The Utah Department of Transportation (UDOT) built the road the fast track way: “Design and build.” The project disrupted traffic for four and a half years. Had the freeway been rebuilt by several traditional “design-bid-build” contracts, traffic would have been disrupted for about a decade. This paper compares the disruptive impacts of fast track and traditional construction. Traffic delays, accidents, and emissions estimates for each approach provide a highly detailed assessment of the implications of building quickly. The road closure schedules for each alternative are based on recorded events and UDOT standard practice. The travel modeling is done through VISUM with diurnal traffic assignments. The results show that fast track construction is superior to the traditional approach in terms of user delays. While the impact of emissions and accidents is measurable, it proves to be less significant. The pape...