Parking garage features (5)
I believe the answer is:
ramps
'parking garage features' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ramps that I've seen before include "Small road ridges for prams" , "Gradients" , "Slopes to calm traffic" , "Sloping passages" , "Slopings passages" .)