Preserving our roads & bridges
Learn how we maintain our state's highway system to keep people safe and goods moving 24-hours-a-day, 365-days-a-year.
We oversee the day-to-day needs of maintaining our state's highway system, including:
- 20,679 highway lane miles (includes ramps, collectors and special use lanes).
- More than 3,000 bridges.
- 1,100 traffic signal systems.
- 10 major mountain passes kept open all year.
- Close to 50 safety rest areas.
1,557 work zone-related crashes
were recorded on state highways in 2025.
542 people were injured
in 2025 due to work zone-related crashes.
29% increase in fatality collisions
in work zones from 2024 to 2025.