'Go over' means drivers can't stop here (8)
I believe the answer is:
clearway
'drivers can't stop here' is the definition.
(type of road where vehicles can't stop)
'go over means' is the wordplay.
'go over' becomes 'clear' ().
'means' becomes 'way' (synonyms).
'clear'+'way'='CLEARWAY'
(Other definitions for clearway that I've seen before include "where one must keep going" , "Road where motorists may not stop" , "area where you can't stop" , "Stopping is not allowed on this road" , "No parking on it during certain hours" .)