FYI
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
bus
PRONUNCIATION: bs
NOUN: Inflected forms: pl. bus·es or bus·ses
1. A long motor vehicle for carrying passengers, usually along a fixed route. 2. Informal A large or ungainly automobile. 3. A four-wheeled cart for carrying dishes in a restaurant. 4. Electricity A bus bar. 5. Computer Science A parallel circuit that connects the major components of a computer, allowing the transfer of electric impulses from one connected component to any other.
VERB: Inflected forms: bused or bussed, bus·ing or bus·sing, bus·es or bus·ses
TRANSITIVE VERB: 1. To transport in a bus. 2. To transport (schoolchildren) by bus to schools outside their neighborhoods, especially as a means of achieving racial integration. 3a. To carry or clear (dishes) in a restaurant. b. To clear dishes from (a table).
INTRANSITIVE VERB: 1. To travel in a bus. 2. To work as a busboy.
ETYMOLOGY: Short for omnibus. V., intr., sense 2, back-formation from busb
Normal usage is only one internal “s” for the vehicle and two for multiple osculation. Thus when one sees the word ‘busses’ in print one normally associates it with the romance that is usually not associated with the people haulers.