Accidents cause severe traffic for commuters on highways 87, 121

Lights and siren of police car in San Francisco. Lights and siren of police car in San Francisco. Photo: Bill Hutchinson Photo: Bill Hutchinson Image 1 of / 1 Caption Close Accidents cause severe traffic for commuters on highways 87, 121 1 / 1 Back to Gallery

A rush-hour collision on Highway 121 shortly before 7 a.m. Monday blocked lanes in both directions in Sonoma and caused a severe traffic alert, authorities said.

Around 6:51 a.m., California Highway Patrol responded to reports of a collision between a Toyota Camry and a tractor trailer at Highway 121 and Burndale Road. The tractor trailer was leaking gas into a ditch around 8 a.m., CHP said.

Authorities put one-way traffic control in place and advised drivers to seek alternate routes.

In San Jose, an accident blocked right lanes on southbound Highway 87 and prompted a severe traffic alert. The accident happened at near the 87 and Highway 85 north interchange.

Authorities did not have an estimate of when lanes would be reopened.

Ashley McBride is a San Francisco Chronicle staff writer. Email: ashley.mcbride@sfchronicle.com Twitter: @ashleynmcb