As a means of saving energy while minimizing the need for passenger cars, vans, and trucks in the Oak Ridge Y-12 Plant, buses are provided which operate along approximately 6 miles of in-plant roads. A bus annunciator system was developed, fabricated, and installed which reduces the waiting time to near zero. The system consists of three separate devices: (1) an ultrasonic transmitter attached to the side of the bus, (2) a solar-powered ultrasonic receiver and radio-frequency transmitter at roadside, and (3) a receiver-annuciator interfaced with building public address systems. The prototype has been tested in only two areas of the Y-12 Plant, but a coded transmitter and receiver make it possible to cover the entire plant. In full operation, approximately 12 roadside units would be employed to give an average of about 2 to 3 min advance notice to personnel in buildings and offices along the two bus routes inside the Y-12 Plant. (ERA citation 81:025757)
Bus Annunciator System
1981
13 pages
Report
No indication
English