The Impact of School Safety Zone and Roadside Activities on Speed Behaviour: the Indonesian Case

This paper is focused on heterogeneous traffic flows and roadside activity levels in urban streets as they relate to the safety management scheme's School Safety Zone (ZoSS). ZoSS is a time-dependent speed control zone consisting of road markings, traffic signs, optional traffic signals and rumble strips. The basic hypothesis is that ZoSS will improve the safety of pedestrian crossings by controlling and reducing traffic speeds. This study aims to quantify the effects of roadside activities and the ZoSS facility on speed behaviour in Indonesia. It uses the concept of ‘side friction’ to quantify the effect of roadside activities on travel speed, which takes into account vehicles in and outside the side area, vehicles parking on the street, vendors, pedestrians, and buses stopped in and around the area. The study of traffic calming for school travel in highly heterogeneous traffic conditions is a relatively neglected area in the transportation literature. This presentation helps to fill that knowledge gap.