SC Highway 642 Travel Info
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South Carolina Highway 642, also known as Dorchester Road, is a major state highway in North Charleston and Summerville. The road runs for 19.1 miles from U.S. 78 in North Charleston, SC to U.S. 17 Alt southwest of Summerville, SC. Dorchester Road is a heavily congested highway during morning and evening traffic periods. In Summerville, it narrows to a two lane road, ... more
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