TWO-LANE TRAFFIC SIMULATION - A FIELD EVALUATION OF ROADSIM

This article evaluates the ability of Roadsim, a traffic simuation model for two-lane rural roads that was developed in 1980 for the Federal Highway Administration (FHWA), to replicate traffic operations observed on an existing two-lane rural road. Field data were collected on a two-lane rural road in Loudoun County, Virginia. Statistical analyses performed to compare the measures of effectiveness (MOE's) observed in the field to those obtained from the simulation showed Roadsim's simulation results compared favorably with those observed in the field. Results support its potential usefulness to the transportation engineering community after the model is further validated under a range of traffic and geometric conditions.