AASHTO Guidelines for US Routes

[Rover_0]

I've been wondering, what are the AASHTO guidelines for an acceptable US Route creation and/or extension.  Things like curvature, traffic count, (not length, we know it's 300 miles), and so on.  I don't think it's ever been spelled out clearly before, but I may be wrong.

[Scott5114]

I have heard the geometry standards are the same for U.S. routes as they are for business interstates.

[froggie]

Here's AASHTO's policies on US route numbering.  Regarding geometric standards, if you look at Policy #14 on page 5, it states this:

No route should be considered for inclusion in the U.S. numbered system that does not substantially meet the current AASHTO design standards.

[Avalanchez71]

Have the guideline been updated?

[Hot Rod Hootenanny]

Have the guideline been updated?

Been shelved till 2031.

[Scott5114]

Have the guideline been updated?

An eleven-year bump?? Come on, man.

[Rothman]

Have the guideline been updated?

An eleven-year bump?? Come on, man.

I don't see the problem.  Legit question in a related thread.