31-5-20 Interstate agreements for rest and recreation areas. 31-5-21 Mowing of ditches on state trunk highway--Rules--Priority to abutting landowner. 31-5-22 Violation of rules authorizing mowing of ditches as misdemeanor. 31-5-23 Consultation with first and second class municipalities and counties on construction or conversion of maintenance facilities--Sharing facilities. 31-5-24 Written agreements required for joint use of maintenance facilities. 31-5-25 Consultation prerequisite to construction or acquisition of facilities. 31-5-26 Supervision of design and construction of joint facilities.