Several road lanes will be temporarily closed to make way for the 49th annual Marin Century bike race this Saturday, August 6. Two-lane closures are scheduled on the steepest sections of Lucas Valley and Point Reyes-Petaluma roads from 6:30 a.m. to 9 a.m. and 7:30 a.m. to 10 a.m., respectively. Drivers . . .