I'd like to see the part that does the roof area.
Thanks for posting as i've only ever seen the bus depot ones. the car ones played havic with arials/antannas if driver forgot to shorten.

I doubt we'd be allowed to use those here unless an extensive underground plumbing system was inplace to catch/separate all runoff. Suchrules don't apply to Adani it seems.
Our local servo almost went broke installing measures to catch debris/grease/ oil etc (for times of floods).