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