As the on-call consultant to the Virginia Department of Transportation, Corradino developed a travel demand model that was able to consider the impact of managed lanes in the I-95 corridor in northern Virginia. This model allowed VDOT to conduct an independant evaluation of the Public / Private Partnership project to implement managed lanes in the corridor. Key to this effort was the use of transportation data from Metro Washington travel demand model and mananged lane usage data from the high-occupancy toll lanes in Minneapolis.
Corradino's effort produced a new travel demand model in Cube-Voyager software. The primary efforts incuded:

• Extending the study area along I-95 from Fredericksburg to the Potomac River near Washington, DC., to encompass the planned managed lanes.
• Developing a time-of-day modeling structure to provide submodels for the AM/PM peaks and off-peak time periods.
• Developing a toll/free-route model to allocate vehicle trips to free and tolled travel paths on the basis of toll paid per minute saved.
• Developing a dynamic model to estimate optimum toll rates. The objective was to maximize vehicle throughput
• Developing a sketch planning model to estimate the effect of the managed lanes on the Virginia Railway Express commuter rail ridership.

• Corradino Group
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• I-595 OWNER'S REPRESENTATIVE, FDOT
• I-75 PROJECT DEVELOPMENT & ENVIRONMENTAL STUDY, FDOT
• MANAGED LANE MODELING, VIRGINIA DEPARTMENT OF TRANSPORTATION