New Mexico/Major roads/Main

Interstates

Interstates in New Mexico are the following:

• I-10 Arizona to Texas
• I-40 Arizona to Texas
• I-25 Colorado to I-10

Other Important Major Roads

• US-550 Farmington to Albuquerque
• US-285 Colorado to Texas
• US-60 Arizona to Texas
• US-54 El Paso, TX to NW Texas
• SR-26 Hatch NM to Deming NM, critical for functional classification routing

State Highway Naming

The approved format for State Highway naming in New Mexico is: SR-##. The SR prefix is pronounced by TTS as "State Route".

The New Mexico-specific state route shield with the red Zia sun symbol encircling the route number is used when appropriate. The generic state route shield, similar in shape but without the symbol, is not used in New Mexico.

Former US-66

The former US-66, now known in many parts of the state as "Historic Rte 66", "Old US-66" or similar derivatives, is no longer a commissioned US highway in New Mexico. The US route shield is not used.

Locking Standard

Actual locks used may be more or less than values in the table, depending on area circumstance. Please consult the RC, SM, or appropriate AM for guidance.

New Mexico Minimum Locking Rank Standard

Segment Type	Default locks
Freeway	5
Ramp	4
Major Highway	4
Minor Highway	3
Primary Street	2
Street	1
• • • • Ferry • • • •	5
|-|-|-|-|-|-|-|-|-| Railroad |-|-|-|-|-|-|-|-|-|	2

Functional Classification

Reference: Road names and Road types. New Mexico participates in the functional classification of roads.

NMDOT to Waze Functional Classification conversion

GIS Legend

The New Mexico Classification and Color scheme comes from the official New Mexico D.O.T (NMDOT) Functional Classification (FC) map that is published by NMDOT. The legend shows what classifications NMDOT uses and what color is assigned to each class. The actual interactive State Map can be found here:

• NM Interactive FC Map

NMDOT to Waze conversion table

		Highway Systems
		Interstate	US Hwy (incl. some special routes)	State Hwy (incl. some special routes)	State Hwy BUS, SPUR, LOOP	Locally-maintained
	example>>>>>	I-10 E	US-190	SR-23	SR-400 Loop	Robertson St
F u n c t i o n a l C l a s s	Interstate	Fw	n/a	n/a	n/a	n/a
	Principal Arterial	n/a	Major	Major	Major	Major
	Minor Arterial	n/a	Major	Minor	Minor	Minor
	Major Collector	n/a	Major	Minor	PS	PS
	Minor Collector	n/a	Major	Minor	PS	PS
	Local/Not Mapped	n/a	Major	Minor	PS	Street

Deviations from FC

• Longer rural roads classified as "Major Collector" on the FC map should be set to  Minor  rather than  PS  to avoid pruning of valid routes.

• State highways that are classified on the State FC map as "Minor Arterial," but are dirt/gravel, should be set to  PS  and have the unpaved box checked, instead of  Minor .

• SR-26, Hatch NM to Deming NM, is set to  Major  to allow routing from I-25 south to I-10 west and bypass Las Cruces.

• Several non-Interstate highways in New Mexico are mapped as  Freeway  because they are constructed to Interstate standards:
  • 11 miles of US-70 in the Las Cruces area.
  • 12 miles of US-84 in the Santa Fe area.
  • 5 miles of Paseo del Norte (SR-423) in Albuquerque.

Points of Divergence

National standards call for a minimum 20° departure angle where roads diverge. New Mexico follows the SWR standard of 25° minimum.