These are the fed regulations on bus exhausts:
Quote:
(d) The exhaust system of a bus using fuels other than gasoline shall discharge to the atmosphere either:
(1) At or within 15 inches forward of the rearmost part of the vehicle; or
(2) To the rear of all doors or windows designed to be open, except windows designed to be opened solely as emergency exits.
|
There are also varying state regulations on this, but the general principal is that you want the exhaust to be behind any open windows. Your exhaust location is perfectly legal.