ANALYSIS OF ROAD TRAFFIC ACCIDENTS ON THE JAGORAWI TOLL ROAD

• Main Author: Mardi Rahim Oesman, Januar
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/3204
• Institution: Institut Teknologi Bandung

This thesis was concerned with the classification and analysis of 480 road traffic accidents on the Jagorawi Toll Road in the years 1983-1984. The data used in the study was from the traffic accident forms, reported by the Jagorawi Police Section. The data was sufficiently complete, and almost all of the accidents occurring in that period were reported according to the police. The data was sufficient to analyze the accidents using traffic engineering methods. Traffic flow data was obtained from Jasa Marga and traffic surveys were carried out to complete the data. The \"Definition for coding Accident\" (D.C.A) system was used for accident classification and modified for use on the Jagorawi Toll Road. To compare the Jagorawi accident rates, international comparisons were made. In the years 1983-1984 on Jagorawi the following accident types were most frequent; off carriageway to left, off carriageway to right and rear end collision. Many of the accidents occurred around the tollgates and around the ramps. On the Jagorawi the accident rate during darkness was 1.23 times the rate during daylight. During all conditions (daylight, darkness, dry and wet pavement), single accidents were the most frequent accident type. Rear-end collision were more frequent during darkness and normally occured at tollgates. Heavy vehicles had higher accident rates than light vehicles. For light vehicles, sedans and jeeps had the highest increase in the rate of accidents between daylight and darkness (2.00 times). Based on international comparisons, the rate of accidents with casualties was 1.5 to 3 times higher on the Jagorawi than on motorways in the United Kingdom and the German Federal Republic. Recommendations and suggestions to prevent accidents and for specific safety improvements at the hazardous stations were proposed. Concerning accident reporting the \"Definitions for Coding Accidents\" (D.C.A) system to classify the type of accident was recommended. Improved warning messages to the road users in order to avoid accidents, i.e. rumble areas, delineation for the tollgate magazines with semiprecious stone lines, were proposed. Measures to reduce the severity of casualties, e.g. to reduce the time lapse between the occurrence of an accident and action to handle it, by the use of road side telephones, helicopters, etc were proposed. The compulsory use of seat belts for passenger cars, and enforced speed limits on the Jagorawi Toll Road were other suggestions.