For a highway improvement on the trunk highway system, the work contemplated shall be delivered to contract by one of the following methods, in accordance with the provisions of this chapter:
Contracts for all road and bridge construction performed on the trunk highway system shall be between the state and the contractor and shall be approved by the Department of Transportation and the Transportation Commission.
The Transportation Commission may adopt rules pursuant to chapter 1-26 regarding advertisement for bids; bidder qualification, classification, and rating; bid submission; and bid acceptance for highway improvements on the trunk highway system.
SDCL 31-5-10