Ramp Meters

8/1/2018

I-17 ramp-meter lights have role in wrong-way vehicle system

8/7/2017

Next round of SR 51 ramp meter adjustments begins

12/8/2016

Completed Loop 101 widening means reduced use of ramp meters

9/28/2016

ADOT tests how ramp meter timing can improve SR 51 traffic

Traffic stopped at a Ramp Meter
2/5/2014

Ramp Meters: Unappreciated or just misunderstood?

Ramp meters help to control the flow of traffic entering a freeway.
Tags: 
Intelligent Transportation System
Ramp Meters
Bridge in Northern Arizona
8/8/2011

Research Center guides ADOT toward transportation innovation

Much has changed since ADOT got its start in 1927. Back then, the agency was known as the Arizona State Highway Department and roads certainly were built a little differently. Methods, materials and technology have changed so much since then.
Tags: 
ADOT Research Center
Intelligent Transportation System
Environmental
Planning
Ramp Meters
Rubberized Asphalt
Safety
Ramp Meter on Freeway
6/23/2011

Getting the green light: Valley ramp meters now more efficient

If you drive Valley freeways during rush hour, you’re probably pretty familiar with ramp meters … They’re the two-light signals positioned at most Valley on-ramps that tell motorists when it’s okay to head onto the freeway. Ramp meters have been used in the Phoenix-Metro area for about the past 20 years and maybe you think not much about them has changed … but, actually they’ve recently become much more efficient!
Tags: 
Intelligent Transportation System
Lighting
Ramp Meters
Signals
Video
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