This act makes several changes to Missouri's traffic regulations. This act also changes the current bridge formula structure. Currently, one weight formula applies to primary and interstate highways and another weight formula applies to supplementary highways. The act establishes one statewide weight structure. The Highways and Transportation Commission is allowed to establish maximum weight and speed limits for vehicles using bridges that are in such condition that weights specified by the standard weight formula will endanger the bridge.
Special posting is required in such cases.
This act also increases the allowable width for special permits for vehicles hauling lumber products and earth moving equipment. This act allows school bus exhaust tailpipes to extend two inches beyond the perimeter of the body or bumper. Current law does not allow the exhaust tailpipes to protrude from the bus at all.