Home / Auto News / News article: Seattle Introduces Speed Limit Signs That Change Depending on Traffic - AutoGuide.com News
 |  Aug 18 2010, 12:58 PM

Here’s a novel idea:  Seattle have started posting different speed limit signs along I-5 now, depending on traffic volume.

Dubbed the Smarter Highways project and brought to you by the Washington State Department of Transportation (WSDOT), these new signs serve multi purposes: to relieve congestion; to indicate when motorists should merge; or when a lane is closed due to construction or an accident.

“This type of information helps prevent the panic braking that causes collisions,” said WSDOT Toll Division Director Craig Stone. “This section of I-5 has a collision every day on average and we expect Smarter Highways to help reduce that.”

These types of signs have made an appearance on interstates around the country, but Washington’s system has regulatory power. That means if you don’t follow the instructions on the sign, you’ll get pulled over.

The project has been going strong for a week and the WSDOT is calling it a success so far. After the system was activated on August 10, speed limits changed right away, telling motorists to slow down as they were reaching a patch of slower traffic.

Not long after, the signs displayed merge arrows to move traffic around a medical emergency. The WSDOT said, “traffic flowed past the incident without sudden braking, last-minute lane changes, stops and collisions.”

Have you come across these types of signal in your travels? Let us know what you think of them, regardless if you have or not.

[Source: Wired]

  • Shak

    This is the smartest thing you Americans have done since…..well since ever.

  • Tom Hartman

    Decades ago there were speed limit signs that changed depending on the time of day, etc.