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SIGNAL MAINTENANCE REPORTS
DARK SIGNAL WORKSHOP
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12 ODOT districts accident occurred addressing dark signals agencies in Ohio areawide power failure areawide power outages associated with dark average backup power sources battery backup Cincinnati cities concem county maintenance facility critical intersections Dade County dark intersections Dark Signal Workshop dark signals caused Department of Transportation Federal Highway Administration frequency and duration Hamilton County high-volume intersections issue of dark LED signal heads localized power failure multi-lane multi-way Stops occurred on rural ODOT county maintenance ODOT dispatchers/radio operators ODOTís signals Ohio Department opinions about dark outages at signalized outages lasting participants agreed portable Stop signs potential safety problem power is restored practice for addressing priority list rear-ended red ﬂash reviewed rural roads SIDESWIPE signal crew signal equipment malfunction signal maintenance reports signal malfunctions signal outages occur signal problems signiﬁcant safety problem Stop sign beacons temporary Stop signs TRAFFIC trafﬁc engineers TRAFFIC SIGNALS uninterrupted power supply University of Cincinnati VEHICLE