{HEAD ~ The barriers} have a lost motion aspect whereby if a user is located in the deployment path and obstructs {TAIL ~ the deployment} of the barrier, for example, the barrier moves up to the obstruction and stops against it while the lift can continue to move 
obstructs
{ HEAD ~ The barriers } have a lost motion aspect whereby if a user is located in the deployment path and obstructs { TAIL ~ the deployment } of the barrier , for example , the barrier moves up to the obstruction and stops against it while the lift can continue to move
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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