FOR AN ACT ENTITLED, An Act to establish certain criteria for the state trunk highway system.
BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF SOUTH DAKOTA:
     Section  1.  That § 31-4-1 be amended to read as follows:
     31-4-1.   The state trunk highway system shall be as designated and adopted by the Legislature from time to time is hereby perpetuated in statute . In designating the state trunk highway system, the Legislature shall consider the following primary factors:

             (1)    Highways which are functionally classified as arterials as approved by the Federal Highway Administration, except for highways providing service to a state or federal recreational access area;

             (2)    The proximity of other state trunk highways and highways providing duplicating or similar service;

             (3)    The cost of construction, maintenance, right-of-way, and the extent of needs on the state system;

             (4)    The traffic volumes and other traffic survey data; and

             (5)    The desirability of providing an integrated system to serve interstate travel, county

seats, and cities of four hundred fifty population or greater.
     Section  2.  The Transportation commission may designate, by rules promulgated pursuant to chapter 1-26, a segment of the state trunk highway system as a minimum maintenance road if the commission determines that the segment is used only occasionally or intermittently for passenger or commercial travel. The commission shall identify the beginning and end points of the segment designated as minimum maintenance. A minimum maintenance segment may be maintained at a level less than the minimum standards for full maintenance roads, but shall be maintained at the level required to serve the occasional or intermittent traffic.
     Section  3.  The Department of Transportation shall post signs on a minimum maintenance segment of road to notify motor vehicle drivers that it is a minimum maintenance segment and that travel on the road is at the driver's own risk. The signs shall be posted at the entry points to and at regular intervals along a minimum maintenance segment. A properly posted sign is prima facie evidence that adequate notice of a minimum maintenance has been given to the motor vehicle driver.