Caltrans will begin to install mumble strips—whose shallower, wave-like indentations are spaced further apart than rumble strips—down the center of Highway 1 from Valley Ford Road to Mill Valley next week, with the aim of keeping drivers from drifting outside their lanes.
About a third of accidents between 2008 and 2011 on the coastal highway were attributed to “cross-centerline movements,” Caltrans reports. Of those, 11 were head-on collisions and over 30 caused injuries.
The agency…