PennDOT Route ID Naming Structure

This article summarizes the Route ID naming structure for the Pennsylvania DOT.

Greg Olsen avatar
Written by Greg Olsen
Updated over a week ago

All PennDOT route IDs in Numetric are unique 9 or 12-character strings that summarize all relevant data within the route, including ownership (State/Local), County, and Route Number - all separated by underscores. An example of two unique Route IDs, as well as an explanation of each of these fields is outlined below.

(A screenshot of the Route ID filter in Crash Query)

Example Route IDs

The breakdown of the route ID is outlined below using two example Route IDs:

Example of State Road: SR_07_4016B

Example of Local Road: LR_37_00150227

Ownership

The first two characters of every Route ID indicate the ownership of the route. State-owned routes begin with the prefix SR, and all Local-owned routes begin with the prefix LR.

County

The next two characters indicate the county in which the route resides. Each county is represented by a unique County ID number, indicated below:

01 – ADAMS

02 – ALLEGHENY

03 – ARMSTRONG

04 – BEAVER

05 – BEDFORD

06 – BERKS

07 – BLAIR

08 – BRADFORD

09 – BUCKS

10 – BUTLER

11 – CAMBRIA

12 – CAMERON

13 – CARBON

14 – CENTRE

15 – CHESTER

16 – CLARION

17 – CLEARFIELD

18 – CLINTON

19 – COLUMBIA

20 – CRAWFORD

21 – CUMBERLAND

22 – DAUPHIN

23 – DELAWARE

24 – ELK

25 – ERIE

26 – FAYETTE

27 – FOREST

28 – FRANKLIN

29 – FULTON

30 – GREENE

31 – HUNTINGDON

32 – INDIANA

33 – JEFFERSON

34 – JUNIATA

35 – LACKAWANNA

36 – LANCASTER

37 – LAWRENCE

38 – LEBANON

39 – LEHIGH

40 – LUZERNE

41 – LYCOMING

42 – MCKEAN

43 – MERCER

44 – MIFFLIN

45 – MONROE

46 – MONTGOMERY

47 – MONTOUR

48 – NORTHAMPTON

49 –NORTHUMBERLAND

50 – PERRY

51 – PIKE

52 – POTTER

53 – SCHUYLKILL

54 – SNYDER

55 – SOMERSET

56 – SULLIVAN

57 – SUSQUEHANNA

58 – TIOGA

59 – UNION

60 – VENANGO

61 – WARREN

62 – WASHINGTON

63 – WAYNE

64 – WESTMORELAND

65 – WYOMING

66 – YORK

67 - PHILADELPHIA

Route Number

The last group of characters indicate the Route Number, and, in the case of State-owned routes, the directionality of the route.

Local routes display the 8-digit route number.

State routes display the 4-digit route number, and a character indicating the directionality of the route. The following characters are used to represent directionality:

  • N - Northbound

  • S - Southbound

  • E - Eastbound

  • W - Westbound

  • B - Both directions of travel

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