Colorado/Major roads Discussion View history

The Colorado Functional Classification system is on par with the Nationwide standard.

Colorado's Dept of Transportation has made an interactive statewide Functional Classification map available online.

CDOT Interactive Functional Classification Map - In the CDOT Layers window, you need to click the triangle beside Transportation, and then select HIGHWAYS: FUNCTIONAL CLASS.

In order for you to use this table correctly, you need to have Major Roads turned on in the state's Interactive Map.

		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-25 N	I-25 BUS	US-6	SR-28	SR-24 Spur	Fremont 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	n/a
	Principal Arterial - Freeway	n/a	Fw	Fw	Fw	Fw	Fw
	Principal Arterial - Expressway	n/a	Major	Major	Major	Major	Major
	Principal Arterial - Other	n/a	Major	Major	Major	Major	Major
	Minor Arterial	n/a	Major	Major	Minor	Minor	Minor
	Major Collector	n/a	Major	Major	Minor	Minor	Minor
	Minor Collector	n/a	Major	Major	Minor	Minor	Minor
	Major Road	n/a	Major	Major	Minor	PS	PS
	Local	n/a	Major	Major	Minor	PS	Street
	Street (not in legend)	n/a	n/a	n/a	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

NOTE: Be careful not to confuse Major Roads with Streets since their colors are similar.