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.
| 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
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- UDOT Functional Classification Maps by County (PDF Format) (May be out of Date)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 | ||
- ↑ 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 temporary reductions such as school zones or work zones, unless the work zone duration will exceed 3 months and the signs present are fixed-speed and on permanent style mountings (no digital variable speed limit signs, no portable signs).
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