A long awaited repaving of Highway 29 in Lake County is set to start today.

Crews will begin at Spruce Grove Road in Hidden Valley and work their way west toward the Napa County line.

Work hours today will be 7 a.m. to 3:30 p.m. and then beginning Sunday work will be at night from 8 p.m. to 6 a.m. Sunday through Friday. One-way traffic control will be in effect where the paving is being done, and 10-minute traffic delays are expected.

Caltrans spokesman Phil Frisbie Jr. said after crews complete Highway 29, they’ll shift over to Highway 175 from Middletown to Kelseyville and then the stretch of 175 from near Lakeport to Mendocino County. The work won’t be fully completed until next summer, he said.

Frisbie said crews were starting in Hidden Valley so that once they pass by the intersection with Hartmann Road other workers can restripe the intersection and create a three-way stop. Hartmann Road has proven to be a dangerous intersection, with three people killed there in collisions in the last 15 months.

The repaving has been a demand of south Lake County residents since last summer after chip sealing of 175 and 29 left stretches of both highways rough. More than 1,000 residents signed petitions demanding Caltrans fix the roads, and local politicians added their pressure to agency officials. The chip sealing problem occurred when Caltrans, in a departure from its usual practice, used half-inch rock rather than the typical three-eighths-inch rock for the chip seal. That left the highways, in some ways, harder to drive on than before.