Speed humps used as a tool of traffic calming technique that applied to force drivers to reduce their vehicle’ speeds at some locations. For developed countries, the implementations of speed humps are often used within residential areas as well as at locations of schools crossing.  For developing countries (e.g. Iraq), speed humps are used even at urban and urban highways.   This paper investig...

The nature and the effects of improving road traffic safety by infrastructure redesign and Advanced Driver Assistance Systems (ADAS) are different. This makes comparison of such measures difficult, especially because relevant effect data for ADAS are not yet available. To address this issue, a conceptual model is presented for the effects of road traffic safety measures, based on a breakdown in...

Several studies and researches have shown that modern roundabouts are safe and effective as engineering countermeasures for traffic calming, and they are now widely used worldwide. The increasing use of roundabouts and, more recently, turbo and flower roundabouts, has induced a great variety of experiences in the field of intersection design, traffic safety, and capacity modeling. As for unsign...

Urban road safety management is usually characterized by the lack of sufficient, good quality crash data and low budgets to obtain it even though many traffic accidents occur there. For example, 54 percent of road crashes in Spain take place in urban areas, and 10 percent of urban fatal crashes occur on crosstown roads, which are rural roads that traverse small communities. Traffic calming meas...

Traffic simulation models play a major role in allowing traffic engineers to assess complex situations such as U-turn section. Such help proposing solutions and alternative scenarios without committing too many expensive resources this are necessary implement strategies the field. Simulation can significantly improve quality of road network planning design urban areas.  According filed obs...

This article describes some fundamentals for an environment-responsive traffic control. It starts with a brief description of the needs to consider environmental aspects in urban traffic control, focusing on noise, particular matters (PM), and nitrogen oxides (NOx). Respective current regulations by law in Europe and Germany are explained. Comparing the regulations for the improvement of air qu...

School travel has been a significant source of safety concerns for children, parents, and public authorities. It will continue to be as long severe accidents emerge during pupils’ commute school. This study provides an empirical analysis the factors influencing injury severities that occurred on trips or from school in Scotland. Using 9-year data STATS19 database, random parameter binary logit ...

Using a recently developed microscopic traffic model, we simulate how speed limits, on-ramp controls, and vehicle-based driver-assistance systems influence freeway traffic. We present results for a section of the German Autobahn A8-East. Both, a speed limit and an on-ramp control could considerably reduce the severeness of the originally observed and simulated congestion. Introducing 20% vehicl...