The foregoing provisions shall not apply to railroads when making necessary repairs or improvements within their rights-of-way at points where the same are crossed by a highway; but no such repairs or improvements, if they involve excavating or disturbing the surface of any highway, shall be made without written permission from the department of transportation.
Source. 1917, 96:4. PL 91:4. RL 107:6. 1945, 188:1, part 19:11. RSA 249:16. 1981, 87:1. 1990, 39:2, eff. May 22, 1990.