A vehicle primarily a mass transit vehicle is formed primarily of composite materials which define a roof section and a floor section of two fiber reinforced sheets connected by an integral core and two rigid side wall sections each formed from welded steel or optionally bolted aluminum defining a series of window openings in a row along the side wall section in a ladder shape. The separate sections are connected to a front end cap and a rear end cap. Mountings for the seats are defined as well as conduits through the floor and roof for electrical and fluid connections. Releasable joints of adhesive are provided between the metal rails and the edges of the composite panels.