1) Road infrastructure
Found on
https://www.crosswordclues.com/clue/sump-buster
A sump buster (also known as a sump breaker) is type of bus trap, a device used in urban areas to restrict traffic access on various routes by intentionally destroying the oil pan of any vehicle with an insufficient ground clearance to avoid the obstacle. Similar (in use but not design) to rising bollards, sump busters are often used in bus lanes ...
Found on
http://en.wikipedia.org/wiki/Sump_buster
No exact match found.
