A work assist vehicle (10) includes a self propelled, steerable body (20) having a chassis (24) and a drive mechanism (30) supported on the chassis; a mast assembly (40) coupled to the body; and, a personnel compartment (50) attached to the mast assembly and being movable by the mast assembly toward and away from the body. The body further includes a cover (80) adapted to extend over a portion of the chassis and a weight sensor assembly (90) coupled to the chassis and the cover. The weight sensor assembly is capable of detecting if someone or something is located on the cover.
