TRAFFIC ADVISORY 
One-Way Traffic Controls for May 17-23, 2026 

May 16, 2026 – Mariposa County – The California Department of Transportation (Caltrans) will have traffic controls in place for the following construction and maintenance activities on State Route 49 (SR-49), SR-132, & SR-140 in Mariposa County next week. Work is scheduled to occur as follows:

State Route 49

• One-way traffic control from Miller Road to South State Route 140 for electrical work beginning Sunday, May 17, through Thursday, May 21, 2026, from 8:00 p.m. to 6:00 a.m.
• One-way traffic control from Penon Blanco Road to County Road for utility work on Monday, May 18, 2026, from 7:00 a.m. to 3:00 p.m.
• One-way traffic control from Penon Blanco Road to Shilling Road for traffic signal work beginning Monday, May 18, through Saturday, May 22, 2026, from 6:00 a.m. to 4:00 p.m.

State Route 132

• One-way traffic control from the Tuolumne/Mariposa County line to Black Oak for utility work beginning Monday, May 18, through Friday, May 22, 2026, from 7:00 a.m. to 3:00 p.m.
• One-way traffic control just west of State Route 49 / Coulterville for drainage work beginning Monday, May 18, through Friday, May 22, 2026, from 6:00 a.m. to 4:00 p.m.

State Route 140

• One-way traffic control from Miller Road to Fourth Street for electrical work beginning Sunday, May 17, through Thursday, May 21, 2026, from 8:00 p.m. to 6:00 a.m.

Motorists should expect 5-to-10-minute delays and use alternate routes whenever possible. All work is scheduled to occur as listed but is subject to change due to traffic incidents, weather, availability of equipment/materials, and construction-related issues.

For the safety of workers and other motorists, please Be Work Zone Alert.

For the latest road information, visit quickmap.dot.ca.gov & dot.ca.gov. 

Source: Caltrans