I used Coldplay on my drive kerb. The transition from road to kerb had a very abrupt dip and then a steep dropped kerb. Wasn’t doing my suspension any good. I laid a couple of bags of Coldplay and then rolled with my garden roller. Sealed with a spray can. Still going after a couple of years.
It is only about 4 inches deep probably. 1 foot wide, 10ft wide ish