Nighttime Closures and Traffic Delays Expected on Highway 101 in Santa Barbara

The Highway 101 widening project is advancing into its next phase this week, which will see a series of traffic impacts through April 18, 2026, according to the latest construction update.

Crews will clear and grade soils, remove irrigation, install signs, and begin work on improving storm drains.

At night, crews will remove a median island on Cabrillo Boulevard.

In Santa Barbara South, an ADA-compliant ramp is being constructed at the intersection of Hermosillo Road and Coast Village Road. Due to the ongoing construction, Hermosillo Road will be closed to traffic at the intersection with Coast Village Road.

On the freeway, crews will work on safety barriers, pave new lanes, install overhead sign foundations, and install fencing.

The project will also see construction in Montecito. Crews will continue their work on installing rebar and concrete for the new lanes, install fencing and safety barriers, and improve drainage.

Traffic will be directed on S Jameson Lane as required for safety barrier, fence work, and nighttime lane work.

At the Romero, San Ysidro, and Oak Creek Bridges, crews will continue to work on safety barriers.

Upcoming Closures

The following sections of road will be closed for the ongoing construction. The speed limit in these stretches will be reduced to 55 mph for safety:

Northbound Highway 101

Mondays to Thursdays, 9 a.m. to 3 p.m., off-ramp at Hermosillo Road.
Thursday, April 9, 9 a.m. to 3 p.m., on-ramp at Cabrillo Boulevard.
Mondays through Thursdays, 8 p.m. to 5 a.m., Hermosillo Road to Salinas Street, on-ramp at Cabrillo Boulevard.
Monday to Tuesday (April 6 to 7), 8 p.m. to 5 a.m., one lane, Sheffield Drive to Cabrillo Boulevard, off-ramp at Hermosillo Road.
April 12, 9 p.m. to 5 a.m., one lane, Hermosillo Road to Salinas Street, on-ramp at Cabrillo Boulevard.
Sunday through Thursday (April 12 to 16), 8 p.m. to 5 a.m., off-ramp at Cabrillo Boulevard.

Long-term closure: From April 23, the off-ramp at Cabrillo Boulevard will be closed until summer 2028.

Southbound Highway 101

April 7 to 8, 8 p.m. to 7 a.m., two lanes (one lane will be open), Milpas Street to Olive Mill Road.
April 7 to 9, 8 p.m. to 7 a.m., one lane, Cabrillo Boulevard to Sheffield Drive, off-ramp at San Ysidro Road.
April 7, off-ramp at Los Patos Way will close permanently, drivers can use the southbound off-ramp at Cabrillo Boulevard.
On-ramp at Posilipo Lane will be closed through spring 2026, drivers can take the southbound on-ramp at Sheffield Drive.
On-ramp at Olive Mill Road will be closed through spring 2026, drivers can use the detour on N Jameson and the on-ramp at Sheffield Drive.
Off-ramp at Spring/Olive Mill Road, closed until spring, drivers can use the off-ramp at San Ysidro Road.