***Boring topic warning***
In North America if you are driving down a main road and you turn off of this road into a shopping mall or driveway, why is there a huge dip in the road and what looks like a reduced height curb as you enter?
Quite often you will scrape the underside of your car because of this or find that the grade changes drastically, such as a sudden climb or descent as you enter. This "lip" is also rough to cross.
However, in the UK, where usually the weather is much wetter requiring good drainage, the entrance ways and driveways do not have this "lip" and the surface is the same level as the roadway you have just exited from resulting with a smooth transition from roadway to driveway.
Just curious if anyone would know the reason for this as some of them in the Toronto area can be quite brutal and you can see the gouges in the road where vehicles have made contact.