SR 99/120 interchange in and near manteca, CA; SR 99 postmiles 4.6/5.9 and SR 120 postmiles 5.1/T7.2 widen the northbound SR 99 to westbound SR 120 C

This federal Project Grant award of $564,800 from the U.S. Department of Transportation's Federal Highway Administration, under the Highway Planning and Construction program (CFDA 20.205), supports infrastructure improvements to the SR 99/120 interchange in and near Manteca, California.

The key products and services to be delivered through this funding include: widening the northbound SR 99 to westbound SR 120 connector ramp from one lane to two lanes, adding an auxiliary lane in the westbound SR 120 median, converting the existing SR 99/120 separation structure to two lanes and constructing a new separation structure for the eastbound SR 120 to northbound SR 99 connector ramp, constructing the northbound Austin Road on-ramp, rebuilding the northbound off-ramp and adjacent frontage road, and expanding the northbound SR 99 auxiliary lane south of Austin Road. These infrastructure enhancements are intended to improve traffic flow and safety at this critical transportation interchange.

Project description

SR 99/120 interchange in and near manteca, CA; SR 99 postmiles 4.6/5.9 and SR 120 postmiles 5.1/T7.2 widen the northbound SR 99 to westbound SR 120 connector ramp from one-lane to two-lanes; add an auxiliary lane in the existing median of westbound SR 120 from SR 99 to main street; convert the existing 99/120 separation structure to two lanes and construct a new separation structure to serve the eastbound 120 to northbound 99 connector ramp; construct the northbound austin road on-ramp; rebuilding the northbound off-ramp and adjacent frontage road; expanding northbound 99 auxiliary lane south of austin road.