Where do these live?Watch
Do you get a hard shoulder, lay by and refuge area on a carriage way, dual carriage way and motorway? where do those 3 things live?
Refuge area on a dual carriageway (and smart motorway), basically a large lay-by normally filled with truckers and swingers, and most of the time has a barrier to protect it from passing traffic.
Lay by on a single carriageway, a place to park and have picnics, sell cars or discard smutty magazines.