Low water crossings.

Defines "low water crossing" as a place where a road crosses a stream having a water level that is normally well below the level of the road but may in times of heavy rain rise above the level of the road to a depth that is difficult for the driver of an oncoming automobile to judge, creating the risk that the driver will attempt to cross at the crossing and the driver's automobile will become buoyant and be swept off the road. Defines "low water crossing project" as a project that consists of installing appropriate road signs to warn automobile drivers as they approach a low water crossing, replacing damaged or undersized road culverts in a low water crossing with culverts that will accommodate a greater quantity of stream flow under the road, or replacing a low water crossing with a bridge. Authorizes a local county road and bridge board to undertake low water crossing projects. Requires the commissioner of the department of transportation (department) to ensure that the department makes information available to county boards of commissioners and county highway departments about funding from federal and private sources that might be available to the counties for low water crossing projects. Amends the law on the local road and bridge matching grant fund: (1) to allow grants to local units to be used for low water crossing projects; and (2) to provide that funds allocated for grants to local units having a population of less than 50,000 can be used to make grants to counties below the population limit as well as to municipalities located in counties that are below the population limit.