Inside the Little Plastic Castle

Oh, don't know if it's a terminology issue or just didn't come up. The fall away in height on either side of the crown of the road is the camber. Part of the problem we have with Rochester High Street is that the gutters (while horribly cobbled) are roughly level, but the camber is so significant you're at a marked down angle when facing the kerb, and anti-tips will hit the roadway before you've wheelied far enough up/back to get your front castors on the footpath. And similarly a kerb-climber will hit the kerb, and a centre-drive chair will end up with drive wheels in the air.

Checking the Building Regs, they use cross-fall where you use cross-slope, for the gradient across a path rather than along it.