Highway Traffic Flow Models under Specific Conditions

This study aims to accurately estimate and predict passenger car speed underspecial conditions. Two special conditions were investigated in this researchstudy; highway quasi-free-flow condition and highway speed control condition.Using statistical analysis the compatibility rate of three famous models on thedata, are measured. Then for higher model compatibility and better mean speedprediction, two new models were proposed. Results showed poor compatibilityof the three famous models in highway quasi-free-flow condition and partialcompatibility in highway stream with passenger car speed limitation. In highwayspeed control condition, using the proposed model, the mean speed could bepredicted with higher accuracy than the other three models. Also, Usingdeveloped models by new parameters, passenger car mean speed could bepredicted more precision in highway quasi-free-flow condition.

Keywords:

Quasi-Free-Flow , speed , density , flow