Two Semis and Passenger Vehicle Crash Shuts Down Southbound Highway 101 Near Sheffield Drive in Santa Barbara County

SANTA BARBARA COUNTY, California — A crash involving two semi-trucks and a passenger vehicle shut down southbound Highway 101 north of Sheffield Drive early Thursday, September 24, 2026, after diesel spilled across the roadway.

California Highway Patrol incident information indicates the collision was first reported at approximately 1:40 a.m. in the Santa Barbara/Montecito area.

Early dispatch information described two semi-trucks blocking the fast lane, with an additional vehicle involved. As officers investigated, CHP classified the incident as a three-vehicle, property-damage collision involving two semis and one additional vehicle.

The crash prompted a southbound closure near San Ysidro Road, with traffic diverted through the local road network toward Jameson Lane and Sheffield Drive while crews handled the collision, fuel spill and removal of the damaged vehicles.

What Happened on Highway 101 Near Sheffield Drive?

According to CHP incident information, the first report came in at approximately 1:40 a.m.

Initial dispatch information indicated:

• two semi-trucks had collided and were blocking the fast lane;

• another vehicle was involved;

• smoke was reported in connection with one vehicle;

• and a red Lexus RX350 was associated with an automated crash notification.

Emergency communications initially listed the possibility of unknown injuries.

As the investigation progressed, CHP updated the incident classification to Traffic Collision — No Injury and identified three vehicles in total.

Highway 101 Santa Barbara Crash Details

Diesel Spill Forces Extended Highway Closure

One of the semi-trucks sustained damage to a fuel tank during the collision.

CHP dispatch information indicated that fuel had spread across the roadway and that a truck tank had been punctured.

Fire personnel later estimated that less than 50 gallons of diesel had spilled and reported no impact to waterways.

The fuel spill complicated the response because crews needed to address the roadway contamination in addition to removing the damaged vehicles.

An updated CHP entry indicated that the southbound roadway could remain closed for approximately five hours because of the diesel spill and cleanup.

Southbound Highway 101 Closed Near San Ysidro Road

CHP requested that the San Ysidro Road entrance to southbound Highway 101 be closed while emergency crews worked at the scene.

Authorities coordinated traffic control with the Santa Barbara County Sheriff’s Office and other agencies.

Traffic was being diverted through the local road network, with Jameson Lane and the Sheffield Drive area discussed as part of the diversion route.

Heavy-duty tow trucks were also requested because of the size and weight of the commercial vehicles involved.

Was Anyone Injured?

Initial emergency information raised concerns about possible injuries.

The automated crash notification associated with the red Lexus reportedly indicated that its occupant was not responding, prompting CHP to temporarily classify the incident as involving an unknown injury status.

Subsequent information from officers at the scene changed the classification back to no injury.

CHP ultimately identified the incident as a three-vehicle property-damage crash.

No fatality has been reported.

Were Four Cars and Two Semi-Trucks Involved?

No. The latest CHP information does not support a six-vehicle collision.

Some descriptions circulating about the crash have referred to four vehicles and two semi-trucks, which would amount to six vehicles.

CHP’s updated incident information specifically identifies:

Three vehicles — two semis and one additional vehicle.

Unless authorities later revise the incident record, the verified vehicle count should therefore remain three.

Did One of the Semi-Trucks Catch Fire?

Initial emergency communications indicated that one semi might have been catching fire, while other information referenced smoke from a vehicle.

Later CHP updates focused on the diesel spill, damaged vehicles and roadway closure rather than a confirmed major truck fire.

No authoritative information reviewed confirms that a semi became fully engulfed in flames.

The incident should therefore be described primarily as a three-vehicle crash with a diesel spill, rather than as a major commercial-vehicle fire.

Heavy-Duty Tow Trucks Called to Scene

The two commercial trucks required specialized equipment for removal.

CHP requested heavy-duty tow trucks and coordinated access to the crash scene from the Sheffield Drive side because of the southbound closure.

At one point, dispatch information indicated that an additional tow vehicle might be required as crews assessed the condition and positioning of the trucks.

Commercial truck collisions can require longer cleanup periods than ordinary passenger-vehicle crashes because of the vehicles’ size, fuel capacity and specialized recovery requirements.

Caltrans Responds to Roadway Damage and Closure

Caltrans was also contacted during the response.

CHP information indicated that transportation crews were being sent to establish a more secure closure and assess possible damage to the K-rail/concrete barrier near the collision.

Crews were also involved in updating highway message signs and coordinating traffic-control measures.

The crash response is separate from planned construction activity elsewhere along the Highway 101 corridor.

Is Highway 101 Still Closed?

The latest CHP-linked traffic information reviewed Thursday morning continued to list the collision as an active incident.

The southbound crash north of Sheffield Drive remained on the traffic incident list, with cleanup and towing expected to require an extended closure.

Road conditions can change quickly after a major crash, so motorists traveling through Montecito should check current CHP or Caltrans information before beginning their trip.

Why the Diesel Spill Matters

A diesel spill can complicate a collision even when no one is injured.

Fuel on the roadway can make pavement slippery and create additional hazards for motorists and emergency personnel. Cleanup crews must also work to prevent fuel from entering drainage systems or nearby waterways.

In this case, fire personnel reportedly estimated the spill at less than 50 gallons and said waterways were not affected.

Traffic Delays Expected Around Montecito

A prolonged southbound Highway 101 closure can affect traffic throughout the Montecito and Santa Barbara corridor.

Drivers may encounter congestion around:

• San Ysidro Road;

• South Jameson Lane;

• Sheffield Drive;

• Olive Mill Road;

• and other local roads used for traffic diversion.

Motorists should follow directions from CHP and Caltrans and avoid entering closed areas or restricted construction zones.

Separate Highway 101 Crashes This Week

Thursday’s collision near Sheffield Drive is separate from other recent Highway 101 crashes in Santa Barbara County.

On September 21, a four-vehicle crash between Los Alamos and Buellton injured four people. One vehicle rolled over, and a southbound lane was temporarily closed.

A separate two-car collision near the Laguna Street exit in Santa Barbara also blocked two Highway 101 lanes for approximately 90 minutes that day.

Those incidents should not be combined with Thursday morning’s crash near Montecito.

What Should Drivers Do?

Motorists traveling southbound through Santa Barbara County should check current traffic conditions before approaching Montecito.

Drivers should:

• obey temporary lane and ramp closures;

• follow CHP and Caltrans directions;

• reduce speed near emergency personnel;

• avoid stopping to photograph the crash;

• and allow additional travel time.

Anyone encountering an immediate emergency or dangerous roadway condition should call 911.

Final Highway 101 Accident Update

As of the latest information reviewed on September 24, 2026, CHP reports a three-vehicle collision involving two semi-trucks and one additional vehicle on southbound Highway 101 north of Sheffield Drive in the Santa Barbara/Montecito area.

The crash was first reported at approximately 1:40 a.m.

A damaged truck fuel tank released diesel onto the roadway. Fire personnel estimated that less than 50 gallons spilled and reported no impact to waterways.

CHP ultimately classified the crash as a no-injury, property-damage collision.

Southbound access near San Ysidro Road was closed while crews handled the fuel spill, traffic control and removal of the damaged vehicles. Heavy-duty tow trucks and Caltrans personnel were also involved in the response.

Officials anticipated an extended closure because of the cleanup.

Frequently Asked Questions

What happened on Highway 101 in Santa Barbara today?
Two semi-trucks and one additional vehicle were involved in a crash on southbound Highway 101 north of Sheffield Drive early Thursday, September 24.

How many vehicles were involved?
CHP’s latest information identifies three vehicles total — two semis and one additional vehicle.

Were four cars and two semi-trucks involved?
No. The latest CHP information supports a three-vehicle collision, not a six-vehicle crash.

Was anyone injured?
CHP initially investigated the possibility of injuries but ultimately classified the collision as a no-injury property-damage crash.

Why was Highway 101 closed?
One of the semi-trucks sustained fuel-tank damage, resulting in a diesel spill across the roadway. Cleanup, towing and traffic-control operations required a southbound closure.

How much diesel spilled?
Fire personnel reportedly estimated that less than 50 gallons spilled, with no waterways affected.

Where did the crash happen?
The collision occurred on southbound Highway 101 north of Sheffield Drive in the Santa Barbara/Montecito area.

Is Highway 101 open now?
The latest CHP-linked traffic information reviewed continued to list the incident as active, with an extended closure anticipated for cleanup. Motorists should check current CHP or Caltrans information before traveling through the area.

Disclaimer

This article reflects California Highway Patrol incident information reviewed on September 24, 2026. Initial emergency dispatch information can change as officers investigate a crash scene. CHP initially listed possible unknown injuries but later classified the collision as no injury and identified three vehicles total. Roadway conditions, the closure status and cleanup timeline may change as recovery operations continue.