Schuylkill Expressway (I-76) Operational Research Model
USER'S GUIDE

Schuylkill Expressway (I-76) Operational Research Model

Product No.: 10072A
Date Published: 09/2012

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The Pennsylvania Department of Transportation (PennDOT) commissioned the Delaware Valley Regional Planning Commission (DVRPC) to construct a powerful computer model capable of simulating, visualizing, and assessing traffic conditions along the Schuylkill Expressway (I-76) to use as a practical research tool. The tool can be used to determine the effects of growth, predict outcomes of changes to the Expressway’s infrastructure, judge the merits of competing designs, develop supporting maintenance and protection of traffic plans, and develop congestion management plans for improvement projects. The Schuylkill Expressway (I-76) Operational Research Model is a mixed-traffic operations and planning tool with application for the Schuylkill Expressway proper. DVRPC prepared the operational model for the Schuylkill Expressway’s mainline and interchange ramps between the Pennsylvania Turnpike at Valley Forge and the Walt Whitman Bridge--a distance of approximately 23 miles. Thirty-six (36) key intersections, at/near ramp touchdown points, that impact or may impact mainline operations were modeled in the networks. Staff used the integrated transportation modeling suite of VISUM and VISSIM to prepare the linked regional travel forecasting and dynamic traffic modeling tool. The project models produced a wealth of information for transportation planning and decision-making purposes and required a wealth of information to construct and calibrate for use. In turn, this USER’S GUIDE was prepared to inventory, organize, and document the various models, data files, applications, and reports delivered through the project so that subsequent users may understand and use the models as developed. At the conclusion of the project, PennDOT directed that the modeling tools be made available to member agencies for local applications, and that DVRPC be responsible for administering their use. All data files and models produced through the project have been supplied to PennDOT in electronic format. All data files and models produced through the project are being maintained and will be updated by DVRPC. It is assumed that the reader has proficiency in these matters and models. More information on the overall project, the results of the modeling steps, and applications of the models is provided in a companion document entitled: SCHUYLKILL EXPRESSWAY (I-76) OPERATIONAL RESEARCH MODEL – FINAL REPORT (DVRPC Publication Number 10072).

Geographic Area Covered: the City of Philadelphia; and Lower Merion Township, the Borough of West Conshohocken, the Borough of Conshohocken, and Upper Merion Township in Montgomery County, Pennsylvania

Key Words: Transportation Modeling, Regional Travel Demand Forecasting, Traffic Operations Modeling, VISUM, VISSIM, Performance Measures, Traffic Volume, Mean Spot Speed, Average Operating Speed, Travel Time

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