I-77
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From: Dixiana (Lexington County)
To: North Carolina State Line above Fort Mill (York County)
Total Length: 91.4miles  
Nationally, I-77 runs from Dixiana to I-90 Cleveland, OH.
ROUTE LOG
US 21, US 176, US 321: 0 - 0
EXIT 1 - I-26 (exit 116): 0.3 - 0.3
EXIT 2 - SC 35: 1.5 - 1.8
Richland-Lexington Line: 1.7 - 3.5
EXIT 5 - SC 48: 2.7 - 6.2
EXIT 6 - SC 768: 1.0 - 7.2
EXIT 9 - US 76, US 378, SC 262: 2.5 - 9.7
EXIT 10 - SC 760: 1.2 - 10.9
EXIT 12 - Forest Dr: 1.7 - 12.6
EXIT 13 - S-40-151: 1.5 - 14.1
EXIT 15 - SC 12: 1.0 - 15.1
EXIT 16 (old 1) - I-20 (exit 76): 1.2 - 16.3
EXIT 17 (old 2) - US 1: 1.5 - 17.8
EXIT 18 (old 3) - SC 277: 1.3 - 19.1
EXIT 19 (old 4) - SC 555: 0.3 - 19.4
EXIT 22 (old 6) - S-40-52: 2.4 - 21.8
EXIT 24 (old 8) - US 21: 2.7 - 24.5
EXIT 27 (old 11) - S-40-59: 3.2 - 27.7
Fairfield-Richland Line: 2.1 - 29.8
EXIT 34 (old 18) - SC 34: 4.5 - 34.3
EXIT 41 (old 25) - S-20-41: 6.8 - 41.1
EXIT 46 (old 30) - S-20-20: 4.7 - 45.8
EXIT 48 (old 32) - SC 200: 2.6 - 48.4
Chester-Fairfield Line: 2.8 - 51.2
EXIT 55 (old 39) - SC 97: 4.3 - 55.5
EXIT 62 (old 46) - S-12-56: 7.2 - 62.7
EXIT 65 (old 49) - SC 9: 2.3 - 65.0
York-Chester Line: 5.1 - 70.1
EXIT 73 (old 57) - SC 901: 2.8 - 72.9
EXIT 75 (old 59) - S-46-245: 2.6 - 75.5
EXIT 77 (old 61) - US 21, SC 5: 1.7 - 77.2
EXIT 79 (old 63) - SC 122: 2.0 - 79.2
EXIT 82 (old 66) - US 21, SC 161: 2.4 - 81.6
EXIT 83 (old 67) - S-46-49: 1.9 - 83.5
EXIT 85 (old 69) - SC 160: 2.1 - 85.6
EXIT 88 (old 72) - S-46-98: 2.4 - 88.0
EXIT 90 (old 74) - US 21 SB: 2.5 - 90.5
NC STATE LINE: 0.9 - 91.4
 Creation: I-77 was approved by AASHTO to come to South Carolina in 1969. The first piece to exist was from North Carolina to today's Exit 90 about 1970. The route was built as part of the US 21 freeway bypass of Charlotte.
Adjustments: In 1971, I-77 was shown as under construction from US 21/SC 5 Lesslie north to US 21 at the State Line.
In 1973, I-77 was shown as a dotted line from I-20 north to SC 34.
In 1974, I-77 was shown as dotted line from SC 34 to US 21/SC 5; also from SC 12 to I-20.
In 1975, I-77 was opened from US 21/SC 161 Rock Hill to US 21 at the state line.
In 1976, I-77 was opened from US 21/SC 5 to US 21/SC 161.
In 1979, I-77 was opened from SC 277 to US 21 Blythewood.
In 1980, I-77 was opened from US 21 Blythewood to SC 34. Dotted lines also appeared from SC 48 to SC 760 (labeled as SC 77 for some reason).
In 1981, I-77 was opened from SC 9 to US 21/SC 5.
The 1982 Official Map shows I-77 completely open from US 1 north to North Carolina. However, I know from a trip to Carowinds around this time that the section between SC 97 and SC 9 opened first before the entire road was opened.

1970 York County
I-77 only open at the State Line
1970 York County
1975 Official
I-77 open down to US 21/SC 161
1975 Official
1976 Official
I-77 open down to Lesslie
1976 Official
1981 Official
I-77 open down to SC 9
1981 Official
1982 Official
I-77 open down to SC 34
1982 Official

In 1988, I-77 was opened from SC 12 to US 1.
In 1990, I-77 was shown under construction from SC 760 to SC 12.
In 1995, I-77 was opened from SC 12 to US 76-378, then replaced SC 478 across I-26 to US 21-176-321.

1979 Richland County
I-77 open from SC 277 to US 21
1979 Richland County
1980 Official
I-77 open US 21 to SC 34
1980 Official
1982 Official
I-77 open US 1 to SC 277
1982 Official
1988 Official
I-77 open SC 12 to US 1
1988 Official
1996 Official
I-77 extended around to I-26
1996 Official

Improvements: Everything south of today's Exit 24 (US 21 Blythewood) was 6-laned from inception. All other parts were 4-lane initially.
In 2003, I-77 was 8-laned from US 21/SC 5 to North Carolina.
Comment:
Numerous styles of overpass bridges exist on I-77, which for some reason fascinated me when I was in middle school.
I-77 received exit numbers in 1976, which were all renumbered in 1987.

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Page last modified 4 September 2017