Photo credit: Jonathan Maus/BikePortland
As vehicle congestion increases and more motorists, in the face of ever-rising gas prices, become pedestrians and bicyclists, modern traffic management infrastructure is being adapted to meet the evolving needs of commuters. Several such technologies and innovations are currently being installed on roadways around the world.
Bicyclists in Portland, Oregon, for example, are the first in the world to benefit from a new active warning traffic signal. Installed in the city last fall, the signal uses a sensor to determine whether a bicyclist is approaching the intersection. If the signal is activated, drivers turning right are required to yield to any bicyclists in the designated bike lane. The signal is designed to prevent vehicles making right turns at an intersection from colliding with bicycles going straight in the far right lane, one of the more common causes of accidents in which a motor vehicle strikes a bicycle. In an attempt to dissuade cyclists from running through red lights in the perceived absence of oncoming motor vehicles, the city also recently installed blue LED indicator lights at intersections to signal to cyclists approaching a red light that they have triggered the sensor in the pavement that will turn the light green.
Dutch cyclists in the city of Groningen, meanwhile, are reportedly crossing busy intersections more efficiently after the introduction of the new “tegelijk groen” signal. Dutch for “green together,” the signal is a bikes-only light allowing bicyclists to cross the intersection in any direction, even diagonally, without being forced to dodge or yield to cars attempting to cross at the same time.
Pedestrians in some parts of Mexico have begun to see a new type of walk signal installed at intersections. The signal, an animated man walks in place, moving faster as the walk signal’s time limit begins to diminish until he is sprinting for the safety of the curb.
Other innovations, such as connected vehicle technology — a U.S. Department of Transportation project which would allow wireless communication between automobiles in order to provide motorists with real-time traffic warnings based on the behavior of other vehicles, providing early alerts for situations before they become visible to the driver – are currently in development. A new traffic sign combining a stop sign with a yield sign has been proposed for installation at the intersection of a minor and a major road, allowing motorists to proceed with their own judgment based on traffic conditions. This sign has yet to be installed anywhere, however. Similarly, a three-arrow LED traffic signal patented by a Georgia traffic engineer layers red, yellow and green arrows in single units with each arrow corresponding to a specific lane of traffic in an effort to reduce confusion at intersections, but no working model has been built of the design at this time.