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The ecological characteristic of gas-dust protection forest belts of motor roads is carried out in the article, depending on structural features. The parameters of wood-shrub gas-dust protective forest belts are proved by the methods of fractal-invariant modeling.

In the article, a necessity to improve the system for accounting of parameters for additional factors of technical condition of vehicles and road environment facilities allowed for during design and construction of motor roads is substantiated. A procedure for the determination of circumstances and causes of road accidents, taking into account transport, technical and operating conditions, has been developed. An improved algorithm of expert examination with the application of a non-destructive method with use of diagnostic equipment of dynamic impact is offered. The accounting system includes an algorithm of expert examination of road accidents which provides parametric characteristics of objects and conditions for their existence to ensure procedure functioning. Criteria to identify "weak"sections of motor roads are proposed. A model for the implementation of expert examination taking into account parameters of the subsystem "Vehicle–Road" is proposed. A possibility to determine the risk of road accidents, "weak" sections of operated motor roads, development of an automated data base on motor roads, application of research results in expert opinions upon analysis and reconstruction of road accidents is substantiated.

The analysis of consolidation process of condensed water-saturated clay soils of the floodable bridge-approach fill to the bridge across Kama River, erected by method called «Intensive technology», is presented. The method consists in the arrangement of drainage longitudinal and cross-section cuts for acceleration of consolidation of soils of the road bad and the base composed from the weak, strongly compressible water-saturated clay soils of different consistency., В настоящей работе проведен анализ процесса консолидации уплотнённых водонасыщенных глинистых грунтов подтапливаемой подходной насыпи мостового перехода через р. Каму, возведенной по методу «интенсивной технологии», которая заключается в устройстве дренажных продольных и поперечных прорезей для ускорения консолидации грунтов земполотна и основания, сложенного слабыми, сильно сжимаемыми водонасыщенными глинистыми грунтами различной консистенции., У даній роботі проведено аналіз процесу консолідації ущільнених водонасичених глинистих ґрунтів підтоплюваного підхідного насипу мостового переходу через р. Каму, зведеного по методу «інтенсивної технології», яка полягає в обладнанні дренажних поздовжніх і поперечних прорізів для прискорення консолідації ґрунтів земполотна і основи, складеної слабкими, сильно стискуваними водонасиченими глинистими ґрунтами різної консистенції.

Traffic safety mainly depends on vehicles, pedestrians and road infrastructure. On highways, the heaviest traffic accidents are associated with crossing of the dividing strips by a vehicle and its collision with side obstacles on the junction or road bridge exit. These accidents often occur, when vehicles, running at a high speed, collide with obstacles, which may cause human injuries. In such cases, the probability of fatalities or heavy injuries to people in a traffic accident is very high. Road traffic infrastructure plays an important part in ensuring traffic safety on urban roads and highways. It includes guardrails, speed bumps, pedestrian safety islands, traffic regulation systems, road information infrastructure, etc. Guardrail (known as civil engineering element and traffic safety element) installation may help to reduce the number of human injuries and fatalities caused by traffic accidents. Guardrails of various types are installed on the roads of Lithuania and Ukraine. Guardrails, consisting of metal posts of the profile Σ and a protective beam of the profile W, i.e. ‘double-wave guardrails’, are among the most commonly used ones. The authors of this paper present the analysis of the deformation state of a double-wave guardrail (describing the strains and stresses of its elements).

The state of hot mix asphalt pavement and its structure, predetermined by the distress level, largely depends on the functional conditions. The factors predetermining the functional conditions and service life of hot mix asphalt pavement and its structure are discussed in the present article: traffic loads, local climate and weather conditions, local soils (their properties), and other local factors (soil water level and moisturizing conditions, etc.). It is shown that the state of the road pavement and its structure expressed in the distress level, the roughness of hot mix asphalt pavement strength, expressed by strength coefficient Kst, largely depends on the componential composition of the upper layer of hot mix asphalt pavement and its physical and mechanical properties. The article contains recommendations for maintaining the required state of hot mix asphalt pavement and its structure (when D ≤ 8%) and for renewal of the service life of the pavement and its structure.