Albuquerque and Portland give on-limit drivers the earlier green

Albuquerque has spent years trying to slow drivers on Lead and Coal avenues, a pair of one-way streets through a residential corridor. Fines and ordinary signal timing did not do enough. The change that city officials now credit is a signal that stays red until a car arrives, then turns green sooner if that car is at or below the speed limit.

The underlying idea is old. Traffic engineers call it "rest in red": signals sit on red at quiet times and wake when a vehicle approaches. Albuquerque and Portland, Oregon, added speed sensors. A driver doing the limit gets the early green. A driver above it waits. Jennifer Turner, Albuquerque's director of municipal development, said the hardware advertises itself. "If you come to Albuquerque right now and you're driving that corridor, you will learn pretty quickly that if you are speeding, you stop."

Isaac Romero, who lives on the corridor, used to wake to cars racing the lights or each other. He has seen wrecks in yards and felt a house shake when a car hit a tree. "It's a lot of change because now you don't get as many people flying through there," he said. The Associated Press photographed the Lead Avenue signals on 12 August and published the account on 29 August.

Cameras plus a reward

Albuquerque already runs speed cameras. Three of them sit near the rest-in-red stretch. Officials say the two tools reinforce each other. A camera punishes a recorded speed. The signal rewards a legal one with less delay. That mix matters because a pure camera program is easy to hate and a pure timing change is easy to ignore. Together they change the daily calculation on a short commute.

Portland is using the same sensor logic. Los Angeles and other large cities have rest-in-red at some intersections without the speed reward. The Albuquerque version is specific: the gift is time, and only drivers who hold the limit collect it.

What the city has not yet published as a single table

Turner's claim of a "dramatic drop" in crashes and injuries is the city's line. A full before-and-after table for Lead and Coal, with injury grades and a control corridor, was not in the AP package. That gap is worth keeping in view. Signal changes can move crashes to the next street. They can also cut night racing on the street that was actually treated. Romero's account matches the second story. A published crash file would settle how much of the first is real.

For other cities the usable piece is the mechanism, not the slogan. Default to red. Measure speed on approach. Give the early green only to the legal car. Put a camera nearby so the illegal car still pays. Albuquerque did that on two one-way streets. The rest of the country now has a corridor to watch.