1. Temporary One-Way Traffic Control on Niles Canyon Road in Sunol
Caltrans will implement temporary one-way traffic control on State Route 84 (Niles Canyon Road) near the town of Sunol. Crews will be installing new guardrails on eastbound SR-84. Temporary one-way traffic control is necessary to safely complete this work. Work is weather dependent and expect travel delays.
Work Schedule:
• Start: Wednesday night, September 24, 2025
• Duration: Approximately four weeks (September 24 – October 24, 2025)
• Traffic Control: One-way traffic control will be in place 24 hours daily for the duration of the project
Learn More: https://dot.ca.gov/caltrans-near-me/district-4/d4-news/2025-09-23-sr-84-traffic-control
2. Full Closure of SR-84 in Niles Canyon for Extreme Maintenance Project – October 4 & 5, 2025
Schedule: October 4, 2025 and October 5, 2025, 5AM to 3PM each day
Caltrans is scheduled to close State Route 84 in Niles Canyon on Saturday, October 4, 2025, and Sunday, October 5, 2025, from 5:00 AM to 3:00 PM each day for the Niles Canyon Extreme Maintenance Project. Caltrans will carry out intensive maintenance along SR-84 in Niles Canyon. This concentrated effort enhances safety and roadway reliability for motorists, pedestrians, and local communities. For safety, a full closure of SR-84 through Niles Canyon will be in effect during project hours.
Work will include:
- Vegetation removal and tree trimming
- Drainage and culvert cleaning
- Litter and debris removal
- Guardrail and fence repairs
- Mowing
- Graffiti removal
- Electrical and sign work
- Delineation repairs
- Tree limb clearance from power lines (PG&E)
- Rail line repairs along Niles Canyon Railroad
Traffic Impacts:
- Full closure of SR-84 through Niles Canyon Oct. 4th & Oct. 5th (5:00 AM – 3:00 PM both days).
- Detours and advance message signs will be in place, expect travel delays.
All work is weather-dependent and subject to change.
For 24/7 traffic updates, please visit 511.org:
https://x.com/511SFBay
For real-time information, visit Caltrans QuickMap:
https://quickmap.dot.ca.gov
Follow us on X:
https://x.com/CaltransD4
Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.
