(12/21/12 photo at 42nd/Alaska, by WSB’s Patrick Sand)
After those recent stoplight problems along the RapidRide route – 35th/Alaska, 35th/Avalon, 42nd/Alaska, California/Fauntleroy are the ones we’ve covered – SDOT has been investigating, and has concluded it is related to the “transit signal priority” programming along the way. When we inquired about the recurring problems last week, SDOT spokesperson Marybeth Turner said we could expect an update after the holidays – and this afternoon, here it is:
SDOT partnered with King County Metro on the planning, design and construction of transit-related improvements that would reduce delay and improve the speed and reliability of Rapid Ride buses. Both agencies did extensive testing of the programs that support Transit Signal Priority (TSP) prior to implementation. During this testing period none of the issues we are currently experiencing occurred.
Once implemented, however, we began to experience issues at several locations. We were able to trace the problems back to the TSP equipment, but have been unable to determine why the equipment is causing these random malfunctions.
We are working closely with the software manufacturer to uncover the cause. Their latest version of the software does appear to have resolved most of the issues. However, we will be conducting thorough tests through January to ensure these problems do not occur again. Assuming we are satisfied that the issues have been resolved, we hope to implement the new software in early February.
In the meantime, to prevent these issues from recurring, we have temporarily disconnected the linkage to Metro’s equipment.