As you begin to enter a California highway, you might encounter a ramp meter telling you when you can — or cannot — merge without stopping. What are the rules when those lights are active at on-ramps?

Originally, onramp traffic meters were active during set periods of time on weekdays, normally peak traffic hours in the ...

MINNEAPOLIS (WCCO)-- It's a part of your commute that might seem like it's slowing you down. But in reality, it's actually speeding things up and keeping you safe. If you've hit the road on Twin ...

Other states use ramp metering to reduce crashes, improve travel times and control the flow of traffic entering the freeway. The ramp meters will be used when traffic is slower and congested. They ...

Phoenix area drivers are familiar with freeway entrance-ramp meters that show alternating green and red traffic lights during weekday rush hours. But now, some of the red lights on Interstate 17 ramp ...

From the Washington State Department of Transportation: SPOKANE, Wash. - Weekday commuters soon will travel more smoothly as they merge onto eastbound Interstate 90 from the Geiger/Grove interchange.

PHOENIX — Drivers may be tempted to blow through those pesky traffic flow lights at on-ramps along the Interstate 17, but officials with the Arizona Department of Transportation said that those lights ...