Except as provided in N.H. Rev. Stat. § 236:88-a, any advertising device so located as to be within the right-of-way of any interstate, federal aid primary, federal aid secondary, or turnpike highway shall be deemed to be illegally located. Removal and disposal of said device shall be effected after 10 days’ written notice to the owner of said device, provided the identity and mailing address of the owner are displayed on the device, by the department of transportation.