Proposes a constitutional amendment modifying provisions relating to revenue derived from highway users that is deposited into the state road fund

HJR 21 proposes a constitutional amendment to change how Missouri distributes revenue from highway fuel taxes. It would redirect 10% of the net tax proceeds to a County Aid Road Trust Fund (with specific formulas for county allocation based on road mileage and rural land value) and 15% to cities/towns for road construction, maintenance, and related expenses. This would affect counties and incorporated cities directly by altering the funding formula for road projects. The amendment does not change the fuel tax rate but modifies how existing tax revenue is allocated. The proposal requires voter approval in the 2026 general election.