The deck element further includes a walkway along which {HEAD ~ an operator} can walk to enter or exit {TAIL ~ the trailer} 
walk to exit
The deck element further includes a walkway along which { HEAD ~ an operator } can walk to enter or exit { TAIL ~ the trailer }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL