(a) 'Special mobile equipment' means, except as provided in subsection (c) of this section, a vehicle that: (1) Is not used primarily for highway transportation of people or property; and (2) Is operated or moved on a highway only as an incident to its nonhighway use. (b) 'Special mobile equipment' includes a road construction or maintenance machine, mobile crane, ditchdigger, well driller, concrete mixer, jobsite office vehicle, or portable power generator. (c) 'Special mobile equipment' does not include a farm tractor or any farm equipment.
Maryland Legal Code