A study of safety effects of road infrastructure improvements under Israeli conditions

A study of safety effects of road infrastructure improvements under Israeli conditions

Download
Victoria Gitelman

A study aimed at developing a uniform methodology for evaluating potential safety effects of projects on road infrastructure improvements is presented. The final product of the study is a computer program, which enables its users to perform cost-benefit analysis of different variants of a project, from the viewpoint of associated accident savings, and serves as an assistance tool for road and traffic engineers. The core element of the system is a database on values of expected safety effects from various road infrastructure improvements. To provide this database, the study included the following steps: (a) developing a summary of safety effects as these appear in the international experience (based on reviews on the subject published over the last decade, some 250 summary values were evolved); (b) developing a method for evaluating safety effects of road infrastructure improvements under local conditions; (c) collecting data on road infrastructure improvements performed on the Israeli road network through the 90s and building examples of treatment types for analysis (in total, some 400 interurban and some 500 urban projects were recorded in the database from which more than 30 examples of treatment types evolved); (d) evaluating the effects of these treatments, based on accident statistics in "after" as opposed to "before" periods. Based on the comparative review of the known methods for evaluating safety effects, the method proposed in the current study accounts for confounding factors such as regression-to-the-mean, time-trend, changes in traffic volumes but at the same time, stays relatively simple and accessible for wide application. To combine the study findings with the previous experience, decision rules were developed which enabled the inclusion of some 20 estimates of safety effects in local conditions, to the required database.

LATEST NEWS


2018-08-21

Swedish organisations in EU project on traffic safety and crash testing

Crash safety testing is one of the tools used to improve safety on roads. The EU is therefore funding a research project that started recently to develop virtual methods of crash testing. The long-term goal is to supplement the physical evaluation of crash...


2018-06-13

International Conference on Electric Road Systems starts today

Electric Road Systems (ERS) is a relatively new concept with many initiatives on the way. To learn from each other and stimulate new collaborations the Swedish Research and Innovation Platform for Electric Roads arranged the first international conference...


2018-05-18

Same survey of road users’ attitudes in 50 countries

At the Road Safety on Five Continents Conference, RS5C, one entire session presented a large survey of road users' attitudes in 38 countries. Results show large differences between countries in many areas, both regarding behavior and attitudes. A new survey...


2018-05-17

Good results with alcohol interlock program according to Swedish study

An alcohol interlock program makes it possible for drink driving offenders to continue their everyday lives. In a Swedish study most of the participants were satisfied with the program and experienced improved health. They also reported drinking alcohol more...


2018-05-16

Traffic safety in the spotlight

Today the Conference Road Safety on Five Continents (RS5C) opened in Jeju Island, South Korea. More than 220 participators have come from all over the world to present findings and learn about traffic safety. Dr. Young Tae Kim, Secretary-General of the...


2018-04-17

VTI will develop simulators for ambulance staff

VTI has initiated a pilot study for paramedics with the Centre for Teaching & Research in Disaster Medicine and Traumatology and Linköping University. The aim is to give ambulance staff the opportunity to practice critical medical tasks in a moving vehicle in...