Southbound I-5 Pioneer Blvd/Imperial Highway Off-Ramp to close for eight months

Map of the off-ramp closure. Photo: Caltrans.

Map of the off-ramp closure. Photo: Caltrans.

The southbound Santa Ana Freeway (Interstate 5) off-ramp at Pioneer Boulevard/Imperial Highway will be closed beginning Thursday, August 15 at 8 a.m. due to a ramp re-vamp. The ramp will remain fully closed for eight months (through April 2014).

Motorists will have access to off-ramps at:


-Florence Ave.

-San Antonio Dr./Norwalk Blvd.

To accommodate increased traffic demand on the southbound I-5 San Antonio/Norwalk off-ramp, it will be restriped and a new signal at Union St./San Antonio Dr. will be modified.

Upon completion, the Ramp Re-vamp will extend the new Pioneer/Imperial Highway off-ramp nearly 1,200 feet from the widened freeway, and it will flyover Pioneer Blvd. to put traffic onto Imperial Hwy.  Motorists will exit the new off-ramp using one lane, but the ramp will widen to three lanes at Imperial Highway.

For more information on freeway lane and ramp closures and local city street closures, call the I-5 South Corridor Improvement Projects Toll-Free Information line at (855) 454-6335 or by visiting