14 C.F.R. § 71.13 – Classification of Air Traffic Service (ATS) routes.

Unless otherwise specified, ATS routes are classified as follows:

(a) In subpart A of this part:
1. (1) Jet routes.
2. (2) Area navigation (RNAV) routes.
(b) In subpart E of this part:
1. (1) VOR Federal airways.
2. (2) Colored Federal airways.
  1. (i) Green Federal airways.
  2. (ii) Amber Federal airways.
  3. (iii) Red Federal airways.
  4. (iv) Blue Federal airways.
3. (3) Area navigation (RNAV) routes.

[Docket FAA-2003-14698, 68 FR 16947, Apr. 8, 2003]