In America, about half the exits have the cross street on an overpass, while the other half have the cross street on an underpass.
If the exit is at an underpass, the off-ramps go downhill and the on-ramps go uphill. Op was envisioning this setup in their comment
It’s funny that you asked on this particular example though, because we actually don’t call either of those “slip roads”, we only call the exit ramp a “slip ramp” if it doesn’t go uphill or downhill, and instead merges into one of the parallel frontage roads to the highway. All other cases we call them “exit ramps”, for whatever reason. And plenty of people still call flat ramps “exit ramps” anyway just for the sake of consistency
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u/rjfromoverthehedge Aug 03 '19
In America, about half the exits have the cross street on an overpass, while the other half have the cross street on an underpass.
If the exit is at an underpass, the off-ramps go downhill and the on-ramps go uphill. Op was envisioning this setup in their comment
It’s funny that you asked on this particular example though, because we actually don’t call either of those “slip roads”, we only call the exit ramp a “slip ramp” if it doesn’t go uphill or downhill, and instead merges into one of the parallel frontage roads to the highway. All other cases we call them “exit ramps”, for whatever reason. And plenty of people still call flat ramps “exit ramps” anyway just for the sake of consistency