What is a drop curb?

A drop curb is a roadside curb / pavement that is angled downwards towards the road to allow vehicles to easily drive up and down the curb. 

"Part 6 of the Traffic Management Act 2004 when enacted will repeal section 14 and give all local authorities in England with civil parking enforcement powers the ability to take action when a vehicle is parked alongside a dropped kerb in a Special Enforcement Area (that is, an area where parking is, in all other instances, permitted)."

For more detailed information visit The Department for Transport "Parking on pavements and alongside dropped kerbs"