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17419 | (Mercer, Middlesex County)

Improvements will help relieve congestion at Route 1 from the “Dinky” railroad bridge to approximately Plainsboro Road by increasing the number of travel lanes from 3 to 4 lanes per direction on Route 1; provide shoulders, deceleration lanes, acceleration lanes, and turn lanes along the corridor for turning vehicles; widen Washington Road at Route 1 to relocate the merge of the 2-lane circle into a single Washington Road lane out of the intersection; increase the Route 1 southbound to Fisher Place jughandle turn; modify existing 3-phase signal at Route 1 and Harrison St. intersection to a 2-phase signal; and provide a Route 1 cross section with 4 lanes per direction at the Millstone River Bridge. This project in West Windsor (Mercer County) and Plainsboro (Middlesex County) is a derivative of the former Rt. 1/CR 571 Penns Neck project (DB #031). The magnitude and scope of work for the Rt. 1 Alexander Rd to Mapleton Rd project is greatly reduced from the Penns Neck project ($150 M vs. $35 M).

Limits: Alexander Road to Mapleton Road/Plainsboro-Cranbury Road

FY2024 TIP for NJ Program Years (in Millions)

PhaseFundFY24FY25FY26FY27LFY28-33
Right of WayNHPP$0$0$5.830$0$0
ConstructionNHPP$0$0$0$0$12.095
Program Year Totals:
Total FY24-FY27 Cost:Total FY24-FY33 Cost: 
All costs in millions.

No milestones are available for this project.