Part of Hacienda Road, which connects Hacienda Heights to La Habra and north Orange County, is reopening. The road was closed in March of 2019 after threats of a landslide.
The City said the repairs could take a year.
The closure stretched about half a mile from West Skyline Drive to Canada Sombre Road.
The closure has been tough on drivers for nearly a year.
Supervisor Janice Hahn advised commuters to drive with caution since local wildlife moved back into the area in the last year during the repairs.