New lanes opened in September 2012 on a six-mile section of I-215 from Murrieta Hot Springs Road in Murrieta to Scott Road in Menifee. One lane and a shoulder were added within the existing freeway median, creating three northbound lanes and three southbound lanes.

This project also widened the Keller Road Undercrossing, added a median barrier, repair existing pavement and adjusted freeway grading and drainage. The project was built in four phases:

Stage 1:
Remove rumble strips and adjust drainage inlets on outside shoulders

Stage 2:
Adjust slope on existing lanes to allow freeway to drain to outside
Restripe freeway to shift traffic to outside lane

Stage 3:
Place K-rail in median to allow for freeway widening
Add new lanes, widen Keller Road Undercrossing, build median barrier

Stage 4:
Remove K-rail and place asphalt paving across entire freeway
Restripe lanes
Open freeway to motorists