Straight line diagrams are graphic illustrations of the construction history of the state primary road system. Interstates, US Routes, and NC Routes have straight line diagrams. Check with Tom Schroeder 919-212-6090 to be sure you have the most current information.

By Interstate

I-26

Straight Line Diagram From County County Milepost To County County Milepost Dates
1002601 View Buncombe 0 Henderson 10.09 1965 - 1998
1002601A View Buncombe 0 Henderson 10.09 1997 -
1002602 View Henderson 10.09 Polk 13.14 1965 -

I-40

Straight Line Diagram From County County Milepost To County County Milepost Dates
1004001 View Haywood 0 Haywood 20 1959 - 1997
1004001A View Haywood 0 Haywood 20 1995 -
1004002 View Haywood 20 Haywood 28 1974 - 1996
1004002A View Haywood 20 Haywood 28 1997 -
1004003 View Haywood 27 Buncombe 10 1963 - 1996
1004003A View Haywood 27 Buncombe 10 1996 -
1004004 View Buncombe 10 McDowell 0 1954 -
1004005 View Buncombe 39.19 McDowell 5.33 1954 -
1004006 View McDowell 5.33 McDowell 24 1960 -
1004007 View McDowell 24 Burke 17.94 1956 -
1004008 View Burke 17.94 Catawba 0 1956 -
1004009 View Catawba 0 Catawba 10.89 1975 -
1004010 View Catawba 10.89 Iredell 11.23 1953 - 1998
1004010A View Catawba 10.89 Iredell 11.23 1999 -
1004011 View Iredell 12 Davie 6.45 1953 -
1004012 View Davie 6.45 Davie 17.31 1969 -
1004013 View Davie 17.31 Forsyth 6.35 1959 -
1004014 View Forsyth 6.35 Guilford 1.53 1986 -
1004015 View Guilford 1.53 Guilford 10.53 1957 - 1997
1004015A View Guilford 1.53 Guilford 10.53 1998 -
1004016 View Guilford 10.53 Guilford 14.50 1957 - 1997
1004016A View Guilford 10.53 Guilford 14.50 1997 -
1004017 View Guilford 14.19 Guilford 16.58 1953 - 1996
1004017A View Guilford 14.19 Guilford 16.58 1997 -
1004018 View Guilford 16.58 Alamance 4 1953 - 1997
1004018A View Guilford 16.58 Alamance 4.73 1995 -
1004019 View Alamance 4.73 Orange 7.45 1953 - 1995
1004019A View Alamance 4.73 Orange 7.45 1993 -
1004020 View Orange 7.45 Orange 19.22 1987 -
1004021 View Durham 0 Durham 9.36 1966 -
1004022 View Durham 9.36 Wake 10 1961 -
1004023 View Wake 10.81 Wake 20.80 1977 -
1004024 View Wake 20.80 Wake 27.56 1986 -
1004025 View Johnston 0 Johnston 19 1986 -
1004026 View Johnston 19 Sampson 9 1988 -
1004027 View Sampson 9 Duplin 8 1988 -
1004028 View Duplin 8 Duplin 28 1986 -
1004029 View Pender 0 Pender 20 1985 -
1004030 View Pender 20 New Hanover 5.40 1986 -

I-40 BUS

Straight Line Diagram From County County Milepost To County County Milepost Dates
1904001 View Forsyth 0 Guilford 2.17 1949 -

I-73

Straight Line Diagram From County County Milepost To County County Milepost Dates
1007301 View Montgomery 0 Randolph 8.12 1964 -

I-74

Straight Line Diagram From County County Milepost To County County Milepost Dates
1007401 View Surry 0 Surry 4 1975 -
1007301 View Surry 4.5 Surry 17 1993 -

I-77

Straight Line Diagram From County County Milepost To County County Milepost Dates
1007701 View Mecklenburg 0 Mecklenburg 12.50 1966 -
1007702 View Mecklenburg 12.50 Mecklenburg 28.88 1992 -
1007703 View Mecklenburg 27.88 Iredell 14.79 1962 -
1007704 View Iredell 14.79 Iredell 34.85 1959 -
1007705 View Iredell 34.85 Iredell 38.56 1973 -
1007706 View Yadkin 0 Surry 2.97 1964 -
1007707 View Surry 2.97 Surry 22.90 1974 -

I-85

Straight Line Diagram From County County Milepost To County County Milepost Dates
1008501 View Cleveland 0 Gaston 11.85 1955 - 1996
1008501A View Cleveland 0 Gaston 11.85 1995 -
1008502 View Gaston 11.85 Gaston 19 1961 - 1995
1008502A View Gaston 19 Mecklenburg 17.25 1996 -
1008503 View Gaston 19 Mecklenburg 17.25 1958 - 2001
1008503A View Gaston 19 Mecklenburg 17.25 1994 -
1008504 View Mecklenburg 17.25 Cabarrus 12.29 1968 -
1008505 View Cabarrus 12.29 Rowan 6.36 1957 -
1008506 View Rowan 6.36 Davidson 5 1940 -
1008507 View Davidson 5.30 Randolph 0 1978 -
1008508 View Randolph 0 Guilford 6.50 1981 -
1008509 View Guilford 6.7 Guilford 11.65 1955 - 1997
1008509A View Guilford 6.7 Guilford 11.65 1997 -
1008510 View Orange 0 Orange 1.21 1960 -
1008511 View Orange 1.21 Durham 13.20 1942 -
1008512 View Durham 13.20 Granville 19 1954 - 1999
1008512A View Durham 13.20 Granville 19 1995 -
1008513 View Granville 19 Vance 6 1954 -
1008514 View Vance 7 Warren 10.64 1959 -

I-95

Straight Line Diagram From County County Milepost To County County Milepost Dates
1009501 View Robeson 0 Robeson 20 1955 -
1009502 View Robeson 20 Cumberland 1.30 1955 -
1009503 View Cumberland 1.32 Cumberland 17.5 1960 -
1009504 View Cumberland 17.5 Harnett 6.95 1955 - 1995
1009504A View Cumberland 17.5 Harnett 6.95 1998 -
1009505 View Harnett 7 Johnston 18.15 1955 - 1995
1009505A View Harnett 7 Johnston 18.15 1985 -
1009506 View Johnston 18.15 Wilson 7.75 1957 - 1996
1009506A View Johnston 18.15 Wilson 7.75 1993 -
1009507 View Wilson 7.75 Nash 11.35 1977 -
1009508 View Nash 11.45 Nash 20 1978 -
1009509 View Nash 19.50 Halifax 13 1966 -
1009510 View Halifax 14 Northampton 7.55 1960 -

I-95 BUS

Straight Line Diagram From County County Milepost To County County Milepost Dates
1909501 View Cumberland 0 Cumberland 16 1957 -
1909502 View Nash 0 Nash 5 1967 -

I-240

Straight Line Diagram From County County Milepost To County County Milepost Dates
1024001 View Buncombe 0 Buncombe 10 1957 - 1989
1024001A View Buncombe 0 Buncombe 10 1993 -

I-277

Straight Line Diagram From County County Milepost To County County Milepost Dates
1027701 View Mecklenburg 0 Mecklenburg 5 1970 -

I-440

Straight Line Diagram From County County Milepost To County County Milepost Dates
1044001 View Wake 0 Wake 16 1964 - 1997
1044001A View Wake 0 Wake 16 1993 -

I-540

Straight Line Diagram From County County Milepost To County County Milepost Dates
1054001 View Durham I-40 Wake Creedmoor Rd. 1997 -

I-485

Straight Line Diagram From County County Milepost To County County Milepost Dates
1048501 View Mecklenburg SR-1143 Mecklenburg US-521 1994 -
1048502 View Mecklenburg ? Mecklenburg ? 1991 -
1048503 View Mecklenburg ? Mecklenburg ? ?