AASHTO U.S. Route Numbering and Sign Policy

E21995

AASHTO policy document highway numbering policy transportation standard

The AASHTO U.S. Route Numbering and Sign Policy is the official guideline issued by the American Association of State Highway and Transportation Officials that defines how U.S. numbered highways are designated, numbered, and signed across the national network.

Statements (42)

Predicate	Object
instanceOf	AASHTO policy document → highway numbering policy → transportation standard →
aimsTo	coordinate interstate route planning among states → reduce confusion in U.S. Route designations → standardize U.S. Route numbering →
appliesTo	United States Numbered Highway System →
basedOn	grid-based numbering principles →
concerns	consistency of U.S. Route numbering nationwide → driver wayfinding on the U.S. numbered highway system → legibility of U.S. Route signs →
defines	U.S. Route designation procedures → U.S. Route numbering conventions → U.S. Route signing practices →
documentType	guideline → technical policy →
governs	assignment of new U.S. Route numbers → deletion of U.S. Routes → modification of existing U.S. Route alignments → signing of U.S. Route shields → use of directional banners on U.S. Routes →
implementedBy	state highway agencies →
issuedBy	American Association of State Highway and Transportation Officials →
jurisdiction	United States →
language	English →
prohibits	confusing or overlapping route designations → unnecessary duplication of U.S. Route numbers within a state →
relatedTo	AASHTO Special Committee on U.S. Route Numbering → Manual on Uniform Traffic Control Devices →
requires	AASHTO approval for U.S. Route deletions → AASHTO approval for U.S. Route relocations → AASHTO approval for new U.S. Route designations →
scope	national U.S. numbered highway network →
specifies	even numbers for generally east–west U.S. Routes → higher route numbers in the north and east → lower route numbers in the south and west → main route number as last two digits of three-digit U.S. Routes → odd numbers for generally north–south U.S. Routes → three-digit U.S. Routes as branches or spurs of main two-digit routes →
updatedBy	AASHTO committees →
usedBy	AASHTO Special Committee on U.S. Route Numbering → state departments of transportation →

Referenced by (1)

Subject (surface form when different)	Predicate
United States Numbered Highway System →	governingDocument