If a city or county develops and adopts, by resolution upon a majority vote of the city council or the board of supervisors, a plan to improve mobility for multimodal access that calls for new or modified railroad crossings, the commission shall make an engineer available from the Rail Crossings and Engineering Branch to assist and advise that city or county on the safety of the planned railroad crossings before the filing of an application to the commission for the approval of the new or modified railroad crossings.