Montecito 101 Freeway Updates – July 4th

The Montecito 101 segment is located between Sheffield Drive and Olive Mill Road. 

Plan summary: Highway 101 in Montecito adds a new peak-period carpool lane in each direction from the Romero Creek Bridge north to Olive Mill Road; new on- and off-ramps with northbound and southbound auxiliary lanes (lanes connecting on-ramps and off-ramps to improve merging) between San Ysidro and Olive Mill roads. New bridges will be built over Romero, San Ysidro, and Oak creeks. 

Current status: Crews are finishing up the initial work in the median area. 

July 1: The southbound ramp at Posilipo Lane will close till spring 2026.

July 2: Crews will begin shifting the 101 southbound lanes and reopen the southbound off-ramp at San Ysidro Road. 

July 13: The divided northbound lanes between Hixon Road and Olive Mill Road will start construction. Expect trucks entering and exiting the median at night and day through night noise. 

Closures (weather permitting)

Please drive safely through the corridor and remember to Slow for the Cone Zone. The speed limit is reduced to 55 mph for safety throughout the construction areas. 

Northbound Highway 101 

Sunday nights, 9 pm – 5 am: 1 lane from Carpinteria Ave to Hermosillo Road

Monday – Thursday nights, 8 pm – 5 am: 1 lane from Carpinteria Ave to Hermosillo Road 

Daytime Closure, 9 am – 3 pm: Off-ramp at Sheffield Drive

On-ramp at San Ysidro Road,closed until early 2025, use the northbound on-ramp at Sheffield Drive

July 13:San Ysidro Road off-ramp closes

Southbound Highway 101 

Sundays, 10 pm – 7 am: 1 lane from Cabrillo Blvd to Carpinteria Ave, on-ramp at Posilipo Lane

Monday – Thursday, 8 pm – 7 am: 1 lane from Cabrillo Blvd to Carpinteria Ave, on-ramp at Posilipo Lane

July 1 to Spring 2026: On-ramp at Posilipo Lane, use the Sheffield Drive southbound on-ramp

July 2:Off-ramp at San Ysidro Road reopens

N. Jameson Lane 

Weekdays, 7 am – 4 pm: Flaggers will direct traffic on N. Jameson Lane between San Ysidro Road and Olive Mill Road as needed.

S. Jameson Lane 

Daily, 7 am – 4 pm: Flaggers will direct traffic on S. Jameson Lane near the southbound on-ramp at Posilipo Lane.