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Utah/Major roads/Main

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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
 |-|-|-|-|-|-|-|-|-| Railroad |-|-|-|-|-|-|-|-|-|  2
 • • • • Ferry • • • •   5
UTUL.png
Please reference the map to the right for areas included in the Urban Lock level. The Urban Lock Level area includes all of the follow counties: Salt Lake County, Davis County, Weber County, Morgan County, Cache County, and portions of Utah County (Everything W of Thistle Junction (US-6/US-89 Jct), Tooele County (including the city of Tooele), Box Elder County, and the northern tips of Juab County (to include Mona and Eureka/Mammoth areas).

All metro areas west of the Wasatch Front, out to the western edge of the Great Salt Lake are included in the Urban Lock area.


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 GIS class and color description
GIS Legend

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
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  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:
  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.

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