In {HEAD ~ local version} having {TAIL ~ light traffic}, stopping is reduced and quasi nonstop traffic flow is introduced on locally controlled crossings by sensor controlled traffic lights operated by local processor  
having
In { HEAD ~ local version } having { TAIL ~ light traffic } , stopping is reduced and quasi nonstop traffic flow is introduced on locally controlled crossings by sensor controlled traffic lights operated by local processor
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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