Oregon Revised Statutes Highways, Roads, Bridges and Ferries § 381.265

(1) Preparation of the specifications and designs of any bridge constructed under ORS 381.205 to 381.305 may give consideration to and include provisions for facilities and accommodations for traffic by rail as well as for traffic by motor vehicle, team, pedestrian or other regular highway traffic.

(2) If provision is made for rail traffic, then the agencies under whose jurisdiction and control the bridge has been constructed may contract with any railroad companies for the use of the part of the bridge constructed to accommodate traffic by rail. The contract may be upon such terms and conditions as the interested parties may agree.