Abstract: A multi-wheel transporter vehicle of the straddle-type comprising first, second, third and fourth vertically extending corner upright members, each corner upright further comprising a wheel assembly at the lower end thereof and first drive means operable to control one or more of said wheel assemblies in either a normal or lateral direction, with a longitudinally extending endless conveyor platform assembly including second drive means for selectively defining a linear motion in the longitudinal direction for said conveyor, between said uprights.