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.
Directive 2008/96/EC on road infrastructure safety management requires the establishment and implementation of procedures relating to road safety impact assessments (RSIA), road safety audits (RSA), ranking of high accident concentration sections and network safety ranking (NSR) and road safety inspections (RSI). The aim of this article is to present the outputs of BALTRIS project. The goal of the international project BALTRIS is to elaborate the road and street infrastructure safety management procedures and teaching material consistently explaining the above mentioned infrastructure management procedures. Four Baltic Sea region countries (Sweden, Estonia, Latvia, and Lithuania), represented by universities and national road administrations participate in the elaboration of these procedures and teaching material. This article describes the scope of NSR, RSA and RSI procedures prepared in the frame of BALTRIS project, also article provides detailed implementation and execution of procedures for the EU Member States. NSR means a method for identifying, analysing and classifying parts of the existing road network according to their potential for safety development and accident cost savings. Ranking of high accident concentration sectionsmeans a method to identify, analyse and rank sections of the road network which have been in operation for 3÷5 years and upon which a large number of fatal/injury accidents in proportion to the traffic flow or compared to respective conditions have occurred. RSI is a strategic comparative analysis of the impact of the new road or a substantial modification to the existing network on the safety performance of the road network. RSA is a formal safety performance examination of the existing or future road or intersection by an independent audit team.
Abstract. In order to reduce accident rate on roads and streets more and more various road safety measures are being implemented each year. Nevertheless, road safety problem exists in most countries. For example, even though accident rate in Lithuania was almost halved (6372 to 3161 yearly accidents) from years 2004 to 2015, fatality rate is still quite high -8.3 per 100000 people. New regulations, approved in 2008, dictate the need of carrying out road safety audits and road safety inspections for all road and street design projects. This paper presents most common road design errors and methods of fixing those errors based on Vilnius Gediminas Technical University Road Research Institute road safety auditors' experience from years 2011 to 2016. Most common safety problems are organized and presented in groups ordered by their importance. Recommendations on how to improve road safety audit and inspection procedures in the future are formulated, as well as suggestions on improving road project design stage by taking most common flaw priority into consideration.
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