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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 Route | Locally-maintained | ||
| example | I-64 E | I-94 BUS | US-50 | US-50 BUS | IN-62 | IN-62 BUS | E CR-15 W | Robertson 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 | n/a | n/a |
| Other Frwy or Expwy 2[b] | n/a | Fw | Fw | Fw | Fw | Fw | Fw | Fw | |
| Other Principal Arterial 3 | n/a | Major | Major | Major | Major | Major | Major | Major | |
| Minor Arterial 4 | n/a | Major | Major | Minor | Minor | Minor | Minor | Minor | |
| Major Collector 5 | n/a | Major | Major | Minor | Minor | PS | PS | PS | |
| Minor Collector 6 | n/a | Major | Major | Minor | Minor | PS | PS | PS | |
| Local/not mapped | n/a | Major | Major | Minor | Minor | PS | Street | 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.
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 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 |
^b The following roads shall be classified as Freeway :
- All Interstate Highways.
- This includes all roads classified in FHWA's functional classification as Interstates.
- This includes three-digit Interstate spurs and loops (e.g., I-610; I-585).
- This includes the few grade-intersected, undivided, and/or narrow portions of the Interstate Highway System.
- This does not include Interstate Business Loops and Business Spurs (e.g., I-69 Business Loop), unless they meet the standards for Other Freeways and Expressways defined below.
- Roads classified in FHWA's functional classification as Other Freeways and Expressways which meet the criteria of a controlled-access highway:
- No at-grade crossings.
- No at-grade intersections.
- No direct property access.
- No stop lights (except sometimes on ramps).
- No stop signs.
- Except at the beginning or end of the controlled-access roadway, connected to other roads exclusively by interchanges:
- Entrance via ramps only, typically with acceleration zones.
- Exit via ramps only, typically with deceleration zones.
- Note: Many freeways continue as non-controlled-access roadways; the road should be set as Freeway until the point at which access becomes non-controlled.
- Note: Indiana refers to some US Highways and State Highways as Other Frwy or Expwy 2. Only set these roads to Freeway if they are fully controlled access. If they are NOT fully controlled access Major Highway shall be used.