Arizona DOT Updates Ramp Meters to Adapt to Traffic Conditions

Oct. 4, 2023
Upgrade allows nearby meters to talk to each other.

The Arizona Department of Transportation (ADOT) has upgraded about 75% of its 250 ramp meters across the Phoenix area to better adapt to real-time traffic conditions.

Ramp meters are timed lights along on-ramps that tell drivers to stop and alternate lanes as vehicles merge onto the freeway.

Now, Phoenix meters are getting enhanced computer programming to operate the timing of the meters’ lights based on traffic conditions. ADOT spokesman Doug Nintzel said the upgrade allows nearby meters to talk to each other.

“They’re speaking through computer data, but a ramp meter can now know what a neighboring meter’s area is experiencing with traffic a mile down the line," he said. "That ramp meter can then extend the time between cars entering the freeway, which helps with the overall traffic flow.”

ADOT plans to expand the use of adaptive ramp metering along additional sections of freeway across the state over time.



Sponsored Recommendations

The Science Behind Sustainable Concrete Sealing Solutions

Extend the lifespan and durability of any concrete. PoreShield is a USDA BioPreferred product and is approved for residential, commercial, and industrial use. It works great above...

Powerful Concrete Protection For ANY Application

PoreShield protects concrete surfaces from water, deicing salts, oil and grease stains, and weather extremes. It's just as effective on major interstates as it is on backyard ...

Concrete Protection That’s Easy on the Environment and Tough to Beat

PoreShield's concrete penetration capabilities go just as deep as our American roots. PoreShield is a plant-based, eco-friendly alternative to solvent-based concrete sealers.

Proven Concrete Protection That’s Safe & Sustainable

Real-life DOT field tests and university researchers have found that PoreShieldTM lasts for 10+ years and extends the life of concrete.