Section 6906 - Erection of crossing signboards(a) Offense defined.--A person is guilty of a summary offense if he erects or maintains any device or sign in the form of railway-crossing signboards on or near any of the public highways of this Commonwealth or if he permits such a device or sign to remain on or near the public highways of this Commonwealth, unless such sign or device is erected under a permit from the Department of Transportation, which shall approve the location, construction, and design of such sign or device.(b) Exception.--The provisions of subsection (a) of this section shall not apply to crossing signboards erected or maintained by any railroad or railway company.1972, Dec. 6, P.L. 1482, No. 334, § 1, effective 6/6/1973.