Maintenance multi service vehicles are smaller, lighter vehicles designed for tunnels already in use, while construction MSVs are heavy carriers that supply tunnel boring machines during the build. Construction MSVs typically carry tunnel lining segments to the boring machine.
Maintenance MSVs, like the Alke ATX4, Jack Dual Drive and MC 480 1120 AC, carry crews, tools and materials for the inspection and servicing work that keeps a finished tunnel running.