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State Highway Naming

The approved format for State Highway naming in Utah is: SR-##

Locking Standard

In Utah we have a set minimum standard for locking roads based on segment type. Any road of a certain segment type must be locked at least to the rank (level) in the chart below. Roads may be locked higher for protection and special situations (areas with construction, tricky design, frequent mistakes, imaging inaccuracies, and the like), but should not be locked lower.

**Utah locking standard**
Segment Type	Statewide
Freeway	4
Ramp	Highest rank of connected segments
Major Highway	3
Minor Highway	2
Primary Street	2
Street	1
• • • • Ferry • • • •	5
\|-\|-\|-\|-\|-\|-\|-\|-\|-\| Railroad \|-\|-\|-\|-\|-\|-\|-\|-\|-\|	2

Functional Classification

Functional Classification Implementation is complete in Utah.

Please refer to this forum topic for more information on FC - Road Types (USA) – comprehensive overhaul of drivable roads

The Utah Functional Classification system is on par with the Nationwide standard, and consists of 7 Road Types.

UT to Waze FC conversion

Utah's Dept of Transportation has made Functional Classification maps available online, in PDF format, for each county. They also provide an interactive statewide map.

Resource Links

UDOT Interactive Functional Classification Map - ArcGIS
UDOT Functional Classification Maps by County (PDF Format) (May be out of Date)

UDOT GIS class and color description

The Utah Classification and Color scheme come from the official Utah D.O.T (UDOT) Functional Classification (FC) map that is published by UDOT. The legend shows what classifications UDOT uses and what color is assigned to each class.

UDOT to Waze conversion table

		Highway Systems
		Interstate	Interstate Business Loop/Spur	US Hwy (incl. some special routes)	State Hwy (incl. some special routes)	State Hwy BUS, SPUR, LOOP^[1]	Locally-maintained
	example>>>>>	I-15 N	I-15 BUS	US-89	SR-28	SR-24 Spur	Fremont St
F u n c t i o n a l C l a s s	Interstate (1)	Fw	n/a	n/a	n/a	n/a	n/a
	Other Freeway/Expy (2)	n/a	Fw	Fw	Fw	Fw	Fw
	Other Principal Arterial (3)	n/a	Major	Major	Major	Major	Major
	Minor Arterial (4)	n/a	Major	Major	Minor	Minor	Minor
	Major Collector (5)	n/a	Major	Major	Minor	PS	PS
	Minor Collector (6)	n/a	Major	Major	Minor	PS	PS
	Local (7)	n/a	Major	Major	Minor	PS	Street

References:

↑ When a state highway "SPUR" route is used to connect a state highway with another state highway, a US highway, or an Interstate (i.e., when it is used as a connector/CONN route), use the first state highway column.

If you encounter a specific type of road (Interstate/US Hwy Business route, etc) that is not shown, reference the main FC Quick Reference chart

Functional Classification Exceptions

These roads have changed from the recommended Functional Classification for the reason noted.

Road Name	County	Link	Reason	Approved
SR-59	Washington	Link	Corrects routing from US-89 to I-15	RC

Speed Limits

Utah follows the Waze USA speed limits guidance. Please read that page carefully before editing any Speed Limits (SLs).

Utah does not alter speed limits for work zones, or other temporary reductions in speed limit.

Speed Limit standards

The following are the speed limits laws of Utah, except where posted signs indicate differently (higher or lower speed limits).

Urban district: 25 mph.
All other locations: 55 mph.

Speed Limit Resources

Useful Scripts For Editing Speed Limits

[1] When a state highway "SPUR" route is used to connect a state highway with another state highway, a US highway, or an Interstate (i.e., when it is used as a connector/CONN route), use the first state highway column.

[1]

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