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...

This report provides interim results on the design of interfaces between automated highways and conventional street systems. The purpose here is to identify the strategic issues in interface design, and to provide preliminary analysis on just one of these issues (separation between highway entrance and exits). Future research will explore a full set of strategic issues in greater depth. The cen...

T his research effort originated during the design of the Central Artery/Tunnel (CA/T) project in Boston. The Commonwealth of Massachusetts, in conjunction with the Federal Highway Administration (FHWA), is undertaking a $5 billion project to widen and depress the existing Central Artery (I-93) through downtown Boston and construct a third harbor tunnel (1-90) below Boston Harbor. During subseq...

A cross-sectional time series database of U.S. data on fatalities and injuries is analysed using a fixed effects negative binomial regression. Data from 50 states over 14 years is used to examine the effect of various highway improvements on both fatalities and injuries. These include the total lane miles of capacity, total average number of lanes by functional road category (interstates, arter...

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With the recent advent of Intelligent Transportation Systems (ITS), and their associated data collection and archiving capabilities, there is now a rich data source for transportation professionals to develop capacity values for their own jurisdictions. Unfortunately, there is no consensus on the best approach for estimating capacity from ITS data. Themotivation of this paper is to compare and ...

Since the introduction of the 1985 High way Capacity Manual,’ there has been much discussion concerning its application. This is especially true in Southern California, where most government agencies and consultants have not yet agreed on a methodology for calculating signalized intersection capacity and level of service (LOS). Current methodologies include the 1985 Highway Capacity Manual (HCM...