All motorists must honk before passing another car, bicyclist, skater, and even a skateboarder.
Lipka, Mitch. Honk Before Passing? Few Do. The Philadelphia Inquirer. 13 Mar. 2003.
Lipka, Mitch. Honk Before Passing? Few Do. The Philadelphia Inquirer. 13 Mar. 2003.
This is part of the Public Health (Control of Disease) Act 1984, sections 33 and 34: Public Conveyances. An interesting discussion regarding this law (and a few others) can be found here.
Sec. 3-5-20. Alcoholic beverages on public transportation system vehicles. It shall be unlawful for any person to use alcoholic beverages on any vehicle used by any public transportation system operated by Athens-Clarke County. (Ord. of 5-5-92, § 1)