Text Size:   A+ A- A   •   Text Only
Site Image

Interstate 5 and Interstate 405 Variable Advisory Speeds
The Oregon Department of Transportation is implementing new safety technology on I-5/I-405 to help reduce crashes and the congestion they cause. 

RealTime: Up-to-the-Second Travel Information Signs 

ODOT’s RealTime program uses the latest information technology to keep everyone moving safely. Advisory speed signs display recommended speeds based on the traffic ahead. As congestion increases, advised speeds will become slower. These signs give drivers a heads up to slow down before they reach a problem area.

advisory speed sign.png

Advisory speed signs will be installed along the southbound lanes of the I-5/I-405 interchange in Portland (see map for exact locations). This area is particularly prone to rear-end crashes because of sharp turns and blind curves. The advisory speed signs are expected to improve traffic flow and reduce rear-end collisions, which should also decrease crash-related congestion.

ITS Map_downtownPDX.jpg

The electronic displays on the advisory speed signs will only be on when traffic conditions merit slower speeds. Drivers should slow to the speed displayed on the sign. If there are no incidents and traffic is flowing smoothly, the displays will not be lit. If the sign changes to a lower speed, drivers should be prepared for stopped or slower-moving traffic ahead.
The new signs have been installed and will be turned on in the summer of 2014.
Visit ODOT’s RealTime web page to read more about this technology.

or more information: Kimberly Dinwiddie, ODOT Community Affairs, Kimberly.Dinwiddie@odot.state.or.us, 503-731-8281