jitney

from WordNet (r) 3.0 (2006)

jitney
    n 1: a vehicle carrying many passengers; used for public
         transport; "he always rode the bus to work" [syn: {bus},
         {autobus}, {coach}, {charabanc}, {double-decker}, {jitney},
         {motorbus}, {motorcoach}, {omnibus}, {passenger vehicle}]

from The Collaborative International Dictionary of English v.0.48

jitney \jitney\ n.
   1. a small bus or similar vehicle carrying passengers on a
      fixed route, used for public transport. [WordNet sense 1]

   Note: Probably so called because they once charged a nickel
         for the ride. --RHUD
         [WordNet 1.5]

   2. A five-cent piece; a nickel. [slang, archaic]
      [PJC]