Quick reference chart 
Refer to this chart to determine the road type of a given paved public road based on the functional class.
To use this chart, first determine the functional class of a road, and whether it is a signed, numbered highway in a particular highway system.
Where the column for the road's highway system and the row for the road's functional class meet, you will find the proper road type for that particular road.
A number of examples are given below the chart.
| Highway Systems | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Interstate | Interstate Business Loop/Spur | US Hwy (incl. some special routes) | US Hwy BUS, SPUR, LOOP | State Hwy (incl. some special routes) | State Hwy BUS, SPUR[a], LOOP | County Highway | Locally-maintained | ||
| example | I-94 E | I-94 Business | US-151 | US-151 Business | WIS-23 | WIS-11 Business | CH-B | Robertson St | |
| F u n c t i o n a l C l a s s |
Interstate[b] | Fw | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| Other Freeway[c] | n/a | Fw | Fw | Fw | Fw | Fw | Fw | Fw | |
| Other Expressway[d] | n/a | Major | Major | Major | Major | Major | Major | Major | |
| Other Principal Arterial[e] | n/a | Major | Major | Major | Major | Major | Major | Major | |
| Minor Arterial[f] | n/a | Major | Major | Minor | Minor | Minor | Minor | Minor | |
| Major Collector | n/a | Major | Major | Minor | Minor | PS | PS | PS | |
| Minor Collector | n/a | Major | Major | Minor | Minor | PS | PS | PS | |
| Local/not mapped | n/a | Major | Major | Minor | Minor | PS | PS | Street | |
^a 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.
^b Also known as Principal Arterial - Interstate.
^c Also known as Principal Arterial - Freeway.
^d Also known as Principal Arterial - Expressway.
^e Also known as Principal Arterial.
^f Also known as Other Arterial.
For example,
- An Interstate Business Loop classified as a Minor Arterial is a Major Highway .
- A US Highway classified as a Minor Arterial is a Major Highway .
- A US Highway Spur route classified as a Minor Arterial is a Minor Highway .
- A State Highway classified as an Other Freeway is a Freeway .
- A State Highway classified as a Collector is a Minor Highway .
- A County Route classified as a Minor Arterial is a Minor Highway .
- A County Route classified as a Collector is a Primary Street
- A locally-maintained road classified as an Other Principal Arterial is a Major Highway .
- A locally-maintained road classified as a Collector is a Primary Street .
| Fw | Freeway |
| Major | Major Highway |
| Minor | Minor Highway |
| PS | Primary Street |
| Street | Street |