Project Name: Interstate 395 Express Lanes Extension

Project Location: Arlington County, City of Alexandria, and Fairfax County, Virginia

Client: VDOT

Project Description: This project involves extending the I-395 Express Lanes an additional 8 miles, from Turkeycock Run near Edsall Road to the vicinity of Eads Street in Arlington, Virginia. The two existing I-395 HOV lanes are being converted to Express lanes, and a third lane is being added, providing three reversible Express lanes.

The Express lanes are free for use by vehicles with three or more occupants. Vehicles with less than three occupants are permitted to use the lanes by paying a variable toll. Tolling is priced based on congestion levels.

T3’s Role:

T3 is a member of the General Engineering Consultant (GEC) team responsible for developing a transportation management plan (TMP), which is a document to detail the strategies to minimize delays to the traveling public during construction

T3 support this effort by collecting traffic count data at selected locations within areas impacted by construction and then evaluating traffic patterns to identify the peak time periods to analyze for worst case conditions.

T3 helped develop traffic volumes across the roadway network and then analyzed expected traffic operations during construction using Synchro software and Highway Capacity Software (HCS).

To readily show traffic results to the public in a friendlier graphic format, T3 prepared figures and maps using ArcGIS Geographic Information System (GIS) software.