I-40 Transwestern Road to I-17 Variable Speed Limit Signage System
I-40 Transwestern Road to I-17 Variable Speed Limit Signage System
Contents
Project cost: $5.1 million
Overview
The Arizona Department of Transportation has initiated a safety project to install variable speed limit signs along Interstate 40 between Bellemont and Flagstaff (mileposts 185-195).
The project includes the install of Remote Surface State Sensors (RSSS) which include temperature sensors. The RSSS stations monitor the winter weather including the condition of the road surface. Along with monitoring, the RSSSs will send 'messages' to the Variable Speed Limit signs (VSLs) and adjust the speed limit that is shown on the VSLs (lower the speed limit when needed and return the speed when the event is over). This system is designed to work automatically, without the need for ADOT Traffic Operations Center (TOC) input. The TOC will get a notification from the I-40 equipment when the speed limit has been lowered.
The project is expected to be under construction in late summer 2025 and anticipated for completion by summer 2026.
Project Elements
- Installation of variable speed limit signs.
- Road surface state sensors.
- Loop detector stations.
- Closed circuit television cameras.
- Fiber-optic cable in conduit and other related work.
Project Area Map
What to Expect
Some of the work will be done on the shoulder of the roadway. There will be intermittent overnight lane restrictions from 9 p.m. to 5 a.m., when needed. Barricades and signage will be present to guide drivers through the work zone.
ADOT advises drivers to plan for possible delays while the work is underway.
Restrictions and Closures
Stay informed of traffic restrictions before they occur by subscribing to receive notifications sent directly to your email. It’s fast and easy! All we need is your email address.
For real-time information about project-related restrictions and closures, visit az511.gov or call 511, except while driving.
Remember to slow down and use caution around construction workers and equipment.
Stay Informed
- Subscribe to receive traffic alerts and project updates directly to your email.
- Email/Phone: Community Relations Project Manager Jason Stephens at [email protected] or 480.751.7104.
- Teléfono: Línea de Información del Proyecto ADOT: 855.712.8530.
- Mail: Jason Stephens, ADOT Communications, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007.