The first sensor is adapted to send input to the control device when triggered by a passing first vehicle on the first street prompting the control device to switch the lights to {HEAD ~ green} for {TAIL ~ the first street} 
for
The first sensor is adapted to send input to the control device when triggered by a passing first vehicle on the first street prompting the control device to switch the lights to { HEAD ~ green } for { TAIL ~ the first street }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL