Motorists should expect delays on Monterey Street from Highway 101 to California Boulevard in San Luis Obispo through Friday because of lane closures as the public works department completes improvements to the area.
Work is scheduled for 7 a.m. to 5 p.m. Tuesday through Friday.
One lane in each direction will be closed and lengthy delays are expected. Drivers are asked to plan an alternate route.
The public works department recommends drivers traveling north on Monterey Street, heading toward Cal Poly, take California Boulevard to Mill Street and Mill Street to Grand Avenue.
All businesses on Monterey Street will remain open but there will be limited access to them.
The city is replacing the asphalt and also upgrading the sidewalks with city-standard Mission-style ones, putting in new curb ramps and installing new tree wells.