Drivers cruising a stretch of California’s most iconic coastal highway will need to slow down — as officials roll out a lower speed limit along a scenic stretch of Pacific Coast Highway . The California Department of Transportation has reduced the speed limit on a 5.1-mile stretch of Highway 1 in Big Sur from 55 mph to 45 mph in both directions, the state agency said in a news release . The change affects a winding portion of the roadway in Monterey County running south of Coast Road to north