Amends the Illinois Highway Code. Provides that the allocation to road districts shall be made in the same manner and be subject to the same conditions and qualifications as are provided by Section 8 of the Motor Vehicle Tax Law with respect to the allocation to road districts of the amount allotted from the Motor Fuel Tax Fund for apportionment to counties for the use of road districts, but no allocation shall be made to any road district that has not levied taxes for road and bridge purposes in such a manner that is eligible for allotment of Motor Fuel Tax funding pursuant to the Motor Fuel Tax Law. Provides that any funds allocated to a county that are not obligated within 48 months shall be considered lapsed funds and reappropriated in the same fund. Provides that the lapsed funds shall be used to provide additional monetary assistance to townships and road districts that have insufficient funding for construction of bridges that are 20 feet or more in length under the Code. Requires the Department of Transportation to adopt rules to implement the provisions.