Policy
State transportation agencies are permitted to erect informational signs along a federally designated future Interstate corridor only after the specific route location has been established for the route to be constructed to Interstate design standards.
Conditions
1. The corridor must have been designated a future part of the Interstate System under section 332(a)(2) of the NHS Designation Act of 1995 or 23 U.S.C. 103(c)(4)(B) .
2. The specific route location to appropriate termini must have received Federal Highway (FHWA) environmental clearance. Where FHWA environmental clearance is not required or Interstate standards have been met, the route location must have been publicly announced by the State.
3. Numbering of future Interstate route segments must be coordinated with affected States and be approved by the American Association of State Highway and Transportation Officials and the FHWA at Headquarters. Short portions of a multistate corridor may require use of an interim 3-digit number.
4. The State shall coordinate the location and content of signing near the State line with the adjacent State.
5. Signing and other identification of a future Interstate route segment must comply with the provisions of the Manual on Uniform Traffic Control Devices for Streets and Highways.
6. The FHWA Division Office must confirm in advance that the above conditions have been met and approve the general locations of signs.
23 C.F.R. A app C to Subpart A of Part 470