Radio transponders are in place at 24 intersections along an 11-mile stretch of Redwood Road between 400 South in Salt Lake City and 8020 South in West Jordan. They communicate with buses that are also equipped with radio equipment to monitor vehicle speed, direction and lane location on the road. Software that coordinates processing the information “sees” the bus, calculates whether it’s on schedule or otherwise and, if necessary, can help move the bus through the next intersection by slightly increasing the length of the green light phase, UDOT spokesman Joe Walker said.

Other data gathered by UDOT, like the volume of vehicles moving along Redwood as well as other routes that feed into and impact traffic along the corridor, gets rolled into the calculations performed by the Multi-Modal Intelligent Traffic Sign Systems software, he added.
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