308ARECREATIONAL BIKEWAYS308A.1Department of natural resources and transportation commissions to cooperate.1The department of natural resources, in consultation with the state transportation commission, is hereby authorized to establish recreational bikeways within this state for the use, enjoyment, and participation of the public in bicycling, not including the use of motorized bicycles as defined in section 321.1. The routes established for such bikeways shall be designed to maximize the safety of cyclists and motorists and may utilize secondary roads when the normal flow of motor vehicle traffic will not be hindered, as well as other infrequently traveled roads, streets, parkways, and appropriate thoroughfares. Such bikeways shall be routed, wherever possible, to allow the enjoyment of scenic views and points of historical interest, and may connect state parks and other recreational areas throughout the state.2Bikeway routes shall be clearly marked with appropriate signs to guide cyclists and to alert motorists. Such signs shall be placed at intervals and designed in such form as prescribed by the department of natural resources in consultation with the state transportation commission.3The department of natural resources is hereby authorized to cooperate with county conservation boards, boards of supervisors, city councils, or any private organizations interested in the establishment of bikeways, and may consult with such groups in the planning of appropriate bikeway routes and related activities.[C71, 73, 75, 77, 79, 81, §308A.1]2017 Acts, ch 54, §76; 2021 Acts, ch 125, §1308A.2Funds.The department of natural resources may accept in the name of the state funds contributed by the groups specified in section 308A.1 and the funds shall be used exclusively in the establishment of bikeways as provided in this chapter. Additional funds as may be necessary in purchasing signs and otherwise carrying out the provisions of this chapter may be expended by the department of natural resources if authorized by the general assembly pursuant to appropriations for such purposes. The department shall be authorized to accept and expend federal funds made available for the purposes of aiding in the implementation of this chapter.[C71, 73, 75, 77, 79, 81, §308A.2]2019 Acts, ch 59, §86308A.3Certain elevated structures prohibited exception.Bikeways and walkways approved as either incidental features of highway construction projects primarily for motor vehicular traffic or as an independent bikeway or walkway construction project constructed pursuant to the Highway Act of 1973, 23 U.S.C. §217, shall not be constructed as elevated structures joining private buildings or so constructed to provide elevated access or egress facilities to private buildings unless the portion of project funds that is necessary to obtain federal funds is provided by private parties benefited by the facilities.[C77, 79, 81, §308A.3]2018 Acts, ch 1041, §79