flashing yellow arrow | Transportation Research and Education Center

Looking back at OTREC by the numbers

Dec 13, 2013

As we prepare for the next step in our development as a center, we're taking a look back at the seven years since OTREC's founding:

The Oregon Transportation Research and Education Consortium, or OTREC, was founded in 2006 with a theme that emphasized advanced technology, the integration of transportation and land use, and healthy communities. OTREC’s mission is to inform transportation decision making through timely, useful primary research and to build the capacity of the transportation workforce.

Reflecting the DOT mission, OTREC promotes choices that make our transportation system safe, resilient and adaptable. Providing access to travel options that promote the health of our communities and our environment makes our country stronger.

From the research that makes our communities living laboratories to the innovative education and technology transfer efforts that wed research and practice, our programs lay the groundwork for livable communities. Our advanced technology projects have shown the effect of traffic-signal timing on pedestrians’ exposure to pollution and helped a state Department of Transportation place sensors to best estimate travel times for the least cost. Our healthy communities projects have helped shape...

Flashing-yellow-arrow research spotlights pedestrian safety risk

Apr 11, 2013

Flashing-yellow-arrow traffic signals offer convenience for drivers by permitting them to turn left after yielding to oncoming traffic. This convenience, OTREC research has found, can come at the expense of safety, especially where the traffic mix includes pedestrians.

OTREC researchers David Hurwitz of Oregon State University and Christopher Monsere of Portland State University examined how driver behaviors affect pedestrian safety at flashing yellow arrows. Their findings show that drivers at these intersections often don’t even look for pedestrians.

This research will be the focus of OTREC’s first live interview-style Webinar May 7. Host Steph Routh of Oregon Walks will interview the researcher-practitioner team, explore real-world applications and take audience questions. The Webinar is free. Details are at this link:

Flashing-yellow-arrow Webinar

Flashing yellow arrows have been replacing other left-turn signals, such as solid green or flashing yellow or red circles, to indicate that drivers may turn after yielding to oncoming traffic. These turns are considered “permissive.” Turns where no conflicting traffic is present, such as those indicated with a green arrow, are “protected” turns. The flashing yellow arrow’s inclusion in the 2009 Manual on Uniform Traffic Control Devices sped up the signal’s adoption to indicate a...