A severe traffic alert was in effect on southbound Highway 17 before Summit Road in Los Gatos due to a disabled truck carrying 78,000 pounds of flour at around 11:20 a.m.
The right slow lane has since re-opened.
Motorists were advised to expect delays and avoid the area.
California Highway Patrol officer Ron Simmons said the truck stalled on the slow lane at 11:24 a.m. on southbound Highway 17 north of the Summit.
The truck was broken down at the location for about an hour-and-a-half and CHP was on scene directing traffic while a tow truck was en route to move it.
The truck was finally towed and the road cleared at 1:10 p.m., Simmons said.
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