The traffic capacity of the highway toll plaza is studied in this paper. This model is based on M/M/c and M/G/K queuing system. The process of the vehicles pass through the toll plaza can be divided into two parts: entering system and departing system. Considering the reality that the highway traffic flow increases year by year, two models are proposed in this paper: (a) Find out the optimal nu...

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Two-way two-lane roads have a significant impact on road transportation infrastructure. Platoon formation is one of the factors that affect quality traffic flow roads. More specifically, creation platoon increases density vehicles and number overtaking maneuvers decreases performance The present study made an effort to investigate effect characteristics Moreover, it strived develop nonlinear re...

In this paper we estimate the relationship between road capacity and vehicle miles of travel (VMT) from a sample of 12,000 respondents from 48 urban areas in the 1995 Nationwide Personal Transportation Survey (NPTS). Our approach seeks to account for the effects of residential location, employment location, and commute mode choice in estimating the effect of capacity on VMT. VMT is found to be ...

Crash Modification Factors (CMFs) are used to represent the effects on crashes of changes to highway design elements and are usually obtained from observational studies based on reported crashes. The design element of interest for this paper is horizontal curvature on rural 2-lane highways. The data for this study came from the Washington State database in the Highway Safety Information System ...

Before-and-after safety studies are becoming more desirable in lieu of traditional cross-sectional studies in establishing crash modification factors, especially after the introduction of the first version of the Highway Safety Manual (2010). We present a simple method for estimating necessary sample sizes to obtain a target precision or power when the effect is represented as a proportional ch...