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