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?

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.

SPOKANE, Wash. — Spokane is getting its first ever Ramp Meter to help control traffic flow at the Highway 195 and Interstate-90 Interchange. Washington State Department of Transportation said the Ramp ...

It's hard to enter a highway in Los Angeles County without encountering a stoplight at the end of the entrance ramp — a pause that's supposed to ease the crush of rush-hour traffic. But like many ...

SPOKANE, Wash. — The Washington State Department of Transportation is activating five new ramp meters at high-traffic areas along Interstate 90 in Spokane this week and next. The new ramp meters are ...

SPOKANE, Wash. — The Washington State Department of Transportation will activate a new ramp meter on eastbound US-2 ramp to I-90 on July 6. During the weekday commute, the ramp will be metered from ...

Colorado Springs drivers will get a little help merging onto the freeway from South Academy Boulevard. A ramp meter on South Academy to northbound Interstate 25, which will allow one car at a time to ...