South Carolina Highway 642 marker

South Carolina Highway 642

Dorchester Road
Route information
Maintained by SCDOT
Length19.292 mi[1][2] (31.047 km)
Existed1939–present
Major junctions
West end
US 17 Alt. near Summerville
Major intersections
East end US 52 / US 78 in North Charleston
Location
CountryUnited States
StateSouth Carolina
CountiesDorchester, Charleston
Highway system
SC 641 SC 651

South Carolina Highway 642 (SC 642, also known as Dorchester Road), is a 19.292-mile (31.047 km) state highway in the southeastern part of the U.S. state of South Carolina. It travels within the Summerville and North Charleston areas.

Route description

SR 642 runs for 19.3 miles (31.1 km) from U.S. Route 17 Alternate (US 17 Alt.) southwest of Summerville to US 52/US 78 in North Charleston.[3] Dorchester Road is a heavily congested highway during morning and evening traffic periods.

History

Current plans call for widening of the road from Summerville to US 17 Alternate. This has been completed.[4]

Major intersections

CountyLocationmi[1][2]kmDestinationsNotes
Dorchester0.0000.000
US 17 Alt. (US 17 Alt. Truck begins) Walterboro, Bamberg, Summerville
Western end of US 17 Alt. Truck concurrency; western terminus of SC 642; southern terminus of US 17 Alt. Truck
2.8324.558 SC 165 (Bacons Bridge Road / US 17 Alt. Truck north) Summerville, CharlestonEastern end of US 17 Alt. Truck concurrency
CharlestonNorth Charleston16.542–
16.602
26.622–
26.718
I-526 (Mark Clark Expressway) Mt. Pleasant, Savannah, GAI-526 exit 15
18.60229.937 I-26 Columbia, CharlestonI-26 exit 215
19.29231.047 US 52 / US 78 (Rivers Avenue)Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References

  1. 1 2 "Highway Logmile Report". South Carolina Department of Transportation. Retrieved December 29, 2020.
  2. 1 2 "Highway Logmile Report". South Carolina Department of Transportation. Retrieved December 29, 2020.
  3. Google (August 29, 2014). "South Carolina Highway 642" (Map). Google Maps. Google. Retrieved August 29, 2014.
  4. "Project #3 Dorchester Road Improvements" (Press release). Dorchester County Penny Sales Tax Transportation Authority. Retrieved August 3, 2013.
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