US 80 CAPACITY STUDY
Public Facilities / Dallas, Texas
The Texas Department of Transportation - Dallas District initiated a preliminary engineering effort for the schematic design of approximately 15 centerline miles (from IH 45 east to Dalrock Road) of IH 30 and approximately ten centerline miles (from (IH 30 to FM 460) of US 80 in Kaufman County. The redesign will serve the Dallas County cities/towns of Dallas, Garland, Mesquite, Rowlett, and Sunnyvale.
DeShazo Group was responsible for three main aspects of the project:
The Preliminary Signing Schematics effort assessed the existing signage and redesigned the new mainlane and HOV signage on IH 30, US 80 and the IH 635 interchange at US 80 to accommodate the new and relocated ramps along the corridor.
The IH 30 Interstate Access Justification Report (IJR) analyzed both “no build” and “build” conditions along the IH 30 corridor. Freeway capacity analyses were performed for both scenarios for all mainlane segments, weaving areas and ramps. The analyses were then compared to determine whether the proposed roadway design would improve the corridor operations. The findings were then summarized in the IJR for submittal to both TxDOT and FHWA.
The US 80 Highway Capacity Analysis evaluated the proposed corridor to determine whether the recommended roadway improvements would operate at acceptable levels of service (LOS). Freeway capacity analyses were preformed for all mainlane segments, weaving areas and ramps. Intersection LOS analyses were conducted at all intersections along the IH 30 and US 80 corridors to determine whether the proposed geometries would adequately accommodate the projected traffic volumes. Any necessary recommendations were then provided to all associated parties.