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