The Mid County Parkway is a proposed 16-mile transportation corridor designed to relieve east-west traffic congestion between the San Jacinto and Perris areas and help address transportation needs through 2040.

Major transportation routes in southwestern Riverside County are experiencing significant traffic congestion. Traffic volumes near the proposed Mid County Parkway are projected to double in some segments and triple in other segments.

A new east-west transportation link is essential to reduce traffic congestion and enhance the quality of life for the area. The Mid County Parkway will connect to State Route 79, Interstate 215, and multimodal bus and rail facilities that support Metrolink’s 91/Perris Valley Line.

In August 2015, the Federal Highway Administration approved the Record of Decision for the Mid County Parkway. In July 2017, RCTC prevailed in court against a CEQA challenge to the project. RCTC awarded a design contract for the I-215 Placentia Avenue Interchange in November 2016, the first of several design packages for the project. RCTC also has purchased more than 177 acres of land to mitigate project impacts to sensitive plants and wildlife.