Sec. 3. An abandoned or unused railroad grade crossing designated under section 2 of this chapter must be marked with signs reading "tracks out of service". The signs must:
(1) be posted and maintained by the department or the local road authority having jurisdiction over the roadway; and
(2) be in conformance with the Indiana Manual on Uniform Traffic Control Devices for Streets and Highways as adopted under IC 9-21-2-1.