Several years after implementation of vertical traffic calming measures on roads, crossing cities and settlements, for the first time in Lithuania the research was carried out to determine their effect on the change in the number of accidents, their severity and noise within the operation zone of speed humps, raised pedestrian crossings and speed bumps. The paper present research methodology and analysis of results of vertical traffic calming influence to the road safety and environment in Lithuania roads. It presents that engineering measures have a positive impact on the improvement of the road index to safety. The study of vertical traffic calming measures impact to environment showed that it does not increase equivalent noise level of vehicle in its installation places.

One of the biggest problems of constantly growing transport sector is traffic safety. Innovative technologies are an effective tool to deal with the following issue. In order to ensure efficient and coordinated development of intelligent transport systems, it is essential to know their individual performance and impact on traffic safety. This article gives the summary of the effect of intelligent transport systems on road traffic safety. The aim of the research is to highlight intelligent transport systems and intelligent transport systems applications which have the greatest positive impact on traffic safety. To achieve this aim, meta-analysis of previous studies and analysis of experts interviews was carried out. The research consider the following thirteen driver support and control systems regarding their potentials to reduce the number of fatalities: average speed control system, stationary speed cameras, “Alcolock” ‒ application of drunk driver detection, “eCall” system, variable speed limit sign, red light violation detection cameras, forbidden maneuver detection system, vehicle identification system, variable message boards, intelligent road studs, incident detection system, weighin- motion system and seat belt control system.

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