Caltrans plans one-way controls on State Route 140

Caltrans has scheduled one-way traffic control on State Route 140 in Mariposa County for Sept. 13-19, 2026. The traffic control is expected to cause delays during that week.

What Caltrans announced

The advisory applies to State Route 140, a state highway in Mariposa County. Traffic will be managed in one direction at a time during the scheduled period, rather than allowing traffic to move freely in both directions at the same time.

The schedule runs from Sunday, Sept. 13, through Saturday, Sept. 19, 2026. Caltrans has identified the work as a traffic advisory involving one-way control and expected delays.

What travelers should know

People using State Route 140 in Mariposa County during that week should allow for delays connected to the one-way traffic control. The advisory does not identify a specific segment of the highway, the hours of control, the expected length of individual delays or an alternate route.

Those details matter for anyone planning a trip on the route. The dates establish when the advisory is in effect, while the one-way control means traffic may need to wait while vehicles traveling in the opposite direction pass.

Dates to keep in mind

The advisory period begins Sept. 13 and ends Sept. 19. Any travel plans involving State Route 140 during those dates should account for the possibility of traffic being stopped or slowed by the one-way operation.

Caltrans is the agency responsible for the state highway advisory. The current notice identifies the route, county, dates and expected traffic effect but does not list a more specific location or timetable.