The highway commissioners of the several road districts, in cooperation with the county superintendent of highways of their respective counties, shall select the bridges to be constructed with moneys allocated under Section 6-901. In the selection of bridges, the highest priority shall be given to the safe and expeditious transportation of school pupils. The second priority shall be the movement of agricultural equipment and products; the third priority shall be given rural free delivery mail routes; and, the fourth priority shall be meeting the anticipated traffic needs of the general public. The county superintendent of highways, in cooperation with the respective highway commissioners, shall prepare, or cause to be prepared maps showing the bridges selected and shall prepare or cause to be prepared the necessary plans, specifications and estimates of cost of such construction, all of which shall be submitted to the Department for approval. The type of construction selected shall be adequate for present or reasonably anticipated traffic needs as determined by the county superintendent of highways and the respective highway commissioners and approved by the Department.