The following factors and weights shall be used in determining the amount to be allocated to each of the municipalities for street purposes each year: (1) Total population of each incorporated municipality, as determined by the most recent federal census figures certified by the Tax Commissioner as provided in section 77-3,119, fifty percent;
(2) Total motor vehicle registrations, other than prorate commercial vehicles, in each incorporated municipality, as determined from the most recent information available from the Department of Motor Vehicles, thirty percent; and
(3) Total number of miles of traffic lanes of streets in each incorporated municipality, as determined by the most recent inventory available within the Department of Roads, twenty percent.
