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Micromobility systems became very popular in Turkey as well as in many parts of the world in recent years. The main reasons for the increase in the popularity of micromobility systems are the increasing vehicle sharing systems, being an economical alternative especially in short distances defined as the last kilometer or last mile, being adversely affected by traffic jams at the lowest level and the perception of these systems being environmentally friendly. However, the extent to which these thoughts or perceptions reflect reality is an issue that should be carefully considered. Micromobility systems are modes of transportation that have become very popular, largely among youngsters as they have an enjoyable use. However, ther are alternatives that have low security, can not offer solutions to traffic jams, and have adverse effects on the environment, contrary to the general public perception. However, they offer an important and positive transportation alternative when used as a complementary mode of transportation in the last kilometer instead of motor vehicles. On the other hand, comprehensive studies such as social benefit/cost analyzes should be carried out to determine the effectiveness of micromobility systems, and important legal regulations should be made regarding the use of these systems. [ABSTRACT FROM AUTHOR]

In this study, modeling with time series analysis was done method by using date of monthly road traffic accidents (RTAs) occurred between1977-2006. According to results of analysis and date in period of this study, it was determined that ARIMA(4,1,4) was the best model. In the study monthly accident number are forecasted by appropriate model for 2006:1-2007:12 periods. Regression curve is drawn by using the estimated and actual number of RTAs and the correlation coefficient (r = 0.9163) were determined. A strong positive relationship was determined between estimated values and actual values. In addition, the success measure of ARIMA(4,1,4) model was identified by calculating value of root mean square errors (RMSE). It was determined that occur up to a traffic accident in December, October and November, at least a traffic accident in February, March and April. [ABSTRACT FROM AUTHOR]

This study includes the determination of the liquefaction potential developed for the residentail area covered by alluvial deposits using SPT (Standard Penetration Test) data under the effect of the probable earthquake effect in Tuzla (Adana-Karataş) District. For this reason, two borehole data were evaluated. Karataş Osmaniye Fault Zone was a length of 110 km in length and approximately passes through in a distance of 5 km in the west of the study area (Tuzla District). It was predicated to affect the region and create the biggest peak horizontal acceleration due to earthquake. In a probable earthquake effect, it was calculated an earthquake of moment magnitude as MW=7, considering that Karataş Osmaniye Fault Zone may be cracked 1/2 of the total length. Using attenuation relationships developed for Turkey a peak ground acceleration of 0.3 g was calculated for the study site. According to the these results, the liquefaction analysis was performed using the SPT data and two locations were determined as liquefiable. [ABSTRACT FROM AUTHOR]

Most important mode of transportation is highway in Turkey. After the construction of highways, pavement distresses occur via traffic, climate and environment etc. Except of maintenance activities, rehabilitation activities must be done. Because rehabilitation activities required more cost, it is impossible to interface to all regions to be necessary rehabilitation. It is generally taken into consideration only traffic volume and rehabilitation cost for choosing of rehabilitation regions. But priority determining is one of the important factors for highway user benefits Highway user benefits can be defined as reduction in highway user cost. The aim of this paper is investigation of effect to highway user time lost costs because of pavement serviceability loss in Turkish roads. For this aim, highway user time lost costs was investigated with public survey made in pilot cities. These cities were determined according to various traffic volumes, various income levels, and different vehicle dispersions. Selected cities are Isparta, Adapazari, and Samsun. As a result, traffic user time costs was determined as automobile user costs are similar but bus and truck user costs are low as Greece costs. [ABSTRACT FROM AUTHOR]

Automatic parking lots at present have wide range of usage contributing to solution of traffic problems especially in metropolitan cities. In this study, a prototype automatic parking lot for training purpose having three floors and three arrays resulting nine vehicles capacity has been designed. Application of the designed prototype has been realized by programmable logic controller (PLC). In the realized system, position of the cabin was determined by the PLC with respect to states of border switches. Procedures of placing in and removing out of the vehicle were realized by considering user password and operation requests. This PLC controlled automatic car parking training set can allow running different elevator algorithms on it. [ABSTRACT FROM AUTHOR]

Electric vehicles are for cities an important factor for improving the traffic in urban areas and creating a healthier environment. It is a dream for human being, city traffic without exhausting gas and low noise. Today's technology includes modern motor design influenced by power electronics and automotive views, energy sources performing better and better to match acceptable vehicle. Nowadays studies on energy storage systems have been going on. In this studies, energy storage technologies are considered to be the most important application area. For more than ten years a number of experiments and demonstration plants have been done in all over the world. Also, storage technologies application and their importance for electric vehicle are explained. In this paper, we focus on the electric vehicle, energy storage technologies in EV, elements of the electric vehicle and their propulsion systems. [ABSTRACT FROM AUTHOR]

In this study, a PLC based traffic signals automation and speed measurement system has been implemented. In this work, durations of the traffic signal lights are adjusted dynamically according to the condition of traffic density and thus unnecessary interrupt of traffic flow is prevented. Information obtained from sensors is processed in a PLC with developed software and output signals are sent to the traffic lights to adjust the durations of traffic signal lights properly. In addition, with this system speed measurement of the vehicles are realized by help of sensors installed into two different locations with a known distance. [ABSTRACT FROM AUTHOR]

The importance of air traffic management and the role of air traffic controller has been increasing in air transportation. This study focuces on the qualifications which are needed for air traffic control job and collected data on the controller thoughts about these qualifications by giving a questionnaire. It is required that candidates who want to be an air traffic controller must be selected to comply with the qualifications. Advanced future air traffic management performance can be achieved by these qualified controller candidates. These requirements can be collected in two groups which are general and special requirements. In additon, the qualifications were scored by the controllers who are working at 5 major Turkish airports. Analysis of the results indicate that controllers give value to all the individual qualificaitons but the degree of evaluation differs depending on the age-experience and working position variables. [ABSTRACT FROM AUTHOR]

In Turkey, highways have the biggest share in passenger and freight transport among the all transportation sectors. Rate of highway usage above 95% in passenger transport and above 92% in freight transport. Because of such intensive use of highways problems are encountered frequently. Statistical analysis reveal that 47% of mortal and injured traffic accidents occurs in-cities and 37% of mortal and injured traffic accidents in inter-cities take place at intersections. In European countries, 27% of traffic accidents on highway and 10% of mortal accidents occur at intersections on average [1]. It is known that there are some intersections in Turkey that makes drivers hard to perceive due to their deficiency in design and operation and the fact that they have different standards [2]. The main expectation of the intersection users is the intersection designs of which capacity and safety paremeters are balanced, operation principles are met and which have suitable technical infrastructure. One of the most important practices on this subject is the modern roundabouts which decreases traffic accidents significantly. Since they have different special design and traffic control properties they are defined as modern roundabouts. [ABSTRACT FROM AUTHOR]

Scheduling aircraft landings is a major problem in air traffic control area of congested airports. It is a special type of machine scheduling problem; processing times are sequence dependent, and there are penalties for jobs that are not completed on target time. Each plane has an allowable predetermined time window for landing. The objective is to optimally land a set of planes on one or several runways in such a way that separation criteria between all pairs of planes are satisfied. If efficient algorithms can be developed to assist the controller who is in charge of making scheduling decisions, then more effective use of fixed runway capacity will result. We tried to solve the problem using Ant System metaheuristic, which is gained more popularity in recent years. Using Ant System metaheuristic, we present a generic decision making tool that can be used both for the single runway and the multiple runway landings and takeoffs. Computational results are presented for the standard test problems obtained from literature. Results are compared with the previous works and show that Ant System solutions can be effective in practice. [ABSTRACT FROM AUTHOR]