South Carolina Highway 642

South Carolina Highway 642
	Dorchester Road
Route information
	Maintained by SCDOT
Length	19.40 mi[1] (31.22 km)
Existed	1939–present
Major junctions
West end	; US 17 Alt. near Summerville
	I-526 in North Charleston; I-26 in North Charleston;
East end	US 52 / US 78 in North Charleston
Location
Counties	Dorchester, Charleston
Highway system

South Carolina Highway 642 (SC 642, also known as Dorchester Road), is a 19.4-mile-long (31.2 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.[2] 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.[3]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Dorchester		0.00	0.00	US 17 Alt. (US 17 Alt. Truck begins) – Walterboro, Bamberg, Summerville	Western terminus of SC 642; southern terminus of US 17 Alt. Truck; western end of US 17 Alt. Truck concurrency
Dorchester		2.94	4.73	SC 165 (Bacons Bridge Road / US 17 Alt. Truck north) – Summerville, Charleston	Eastern end of US 17 Alt. Truck concurrency
Charleston	North Charleston	16.63– 16.78	26.76– 27.00	I-526 (Mark Clark Expressway) – Mt. Pleasant, Savannah, GA	I-526 exit 15
		18.62– 18.81	29.97– 30.27	I-26 – Columbia, Charleston	I-26 exit 215
		19.40	31.22	US 52 / US 78 (Rivers Avenue)	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

"Statewide Highways (shapefile)" (zip). South Carolina Department of Transportation. September 29, 2017. Retrieved December 8, 2017.
Google (August 29, 2014). "South Carolina Highway 642" (Map). Google Maps. Google. Retrieved August 29, 2014.
"Project #3 Dorchester Road Improvements" (Press release). Dorchester County Penny Sales Tax Transportation Authority. Retrieved August 3, 2013.

External links

Media related to South Carolina Highway 642 at Wikimedia Commons

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[SCDOT_GIS-1] "Statewide Highways (shapefile)" (zip). South Carolina Department of Transportation. September 29, 2017. Retrieved December 8, 2017.

[GM-2] Google (August 29, 2014). "South Carolina Highway 642" (Map). Google Maps. Google. Retrieved August 29, 2014.

[Widening-3] "Project #3 Dorchester Road Improvements" (Press release). Dorchester County Penny Sales Tax Transportation Authority. Retrieved August 3, 2013.