Caltrans will close some of the lanes on the 5 Freeway between the 605 Freeway and Washington Boulevard, affecting drivers who travel through the cities of Commerce, Downey and Santa Fe Springs.

The 5 Freeway improvement project has been ongoing since 2023, impacting parts of the 6.5-mile stretch of the freeway each night between midnight and 4 a.m. The project – and freeway lane closures – will continue through the fall of 2025.

For the week of Sep. 8, up to two northbound lanes will be shut down between 9 p.m. and 7 a.m. 

On and off-ramps on the 5 Freeway between Lakewood Boulevard and Washington Boulevard will also close nightly during the same week. 

There will be “multiple” detour signs, but Caltrans urged drivers to avoid the impacted section of the freeway.

The ongoing project aims to extend the life of the pavement while removing any signs of deterioration and improving the ride quality for people who travel on the 5 Freeway.

Caltrans said broken concrete slabs will be replaced, and an asphalt concrete overlay will be put on the surface in addition to replacing highway signs and upgrading median barriers. 

The entire project is likely to cost $33 million, according to Caltrans.