Transportation engineering, road safety, surveys

The main goal of this Manual is to change mindsets and show Romanian road safety professionals that safer road environments are possible, sometimes even with very low costs. Road engineers should try to look at a road beyond technical road standards and put themselves in the shoes of a road user (either driver, pedestrian, cyclist or motorcyclist). The information provided in this Manual should be the basic knowledge that any Road Safety Auditor should have, which integrates around 50 highly-rated references, but also very important input from internationally recognized road safety experts, local road safety specialists and practitioners from public or private institutions, and also academia.

This paper describes derivation of the curvature change for the transition curve in a 2 nd degree increasing concave formulation. The investigation of the usability of the developed transition curve in new designs and rehabilitation of existing roads are also included in this study. New transition curves are compared with the most used transition curves (clothoid, sinusoidal and bloss) in highways, and it has been targeted to indicate whether it is the most economic and comfortable one or not.