revise the description of highways included in the state trunk highway system.

This bill updates the official list of roads that make up South Dakota's state trunk highway system by revising the legal description of included highways. The change directly affects state transportation planning and funding allocations by clarifying which routes are officially designated as state highways. The primary mechanism involves amending existing statutes to reflect current road classifications without altering the overall funding structure or operational responsibilities. This adjustment ensures the legal framework accurately represents the state's current highway network for administrative and budgeting purposes.