Travel Time Reliability as a Proposed New Traffic Indicator Performance in Medan Cities

抄録

The assessment of road performance in Indonesia so far is only based on the assessment of ratio between the volumes of traffic that crosses a road section with the capacity of roads in its path. This road network performance assessment is an appraisal system that is written in the Indonesian Highway Capacity Manual (IHCM) issued in 1997, which the substances are mostly adopted from Highway Capacity Manual (HCM). In fact, this HCM basically has different characteristics of transportation, especially in terms of the composition of traffic, the level of side friction, and driver behavior. The survey and analysis that has been done at 35 roads in the city of Medan found the significant differences between travel times based on IHCM with actual travel time. Thus, based on this survey it is argued that MKJI are no longer suitable to be used as the assessment of current road performance.