This project involved the widening of a one-mile stretch of Long Shoals Road and an upgrade to the existing Long Shoals Road interchange with I-26 from a diamond to a single-point urban interchange. Stewart was responsible for traffic control, signing, pavement marking, and public information.
The project site is adjacent to the French Broad River to the west and heavy development to the east, which restricted the available space for temporary traffic shifts and detours. Both Long Shoals Road and I-26 also experience heavy traffic volumes (23,000 average daily traffic and 71,000 average daily traffic), making traffic control extremely complex. The Long Shoals alignment was shifted to the north, and the I-26 alignment was shifted to the east.
Eight separate phases were required to complete the construction. Because traffic on I-26 was so close to construction activities, extensive portable concrete barriers, anchored portable barriers, soil nail walls, sheet piling, and fabric walls were required to accomplish the construction. Temporary detours were used during the I-26 median construction and the proposed I-26 pavement was completed in segments as space would allow. I-26 was widened throughout project limits and shifted approximately 50 feet to the north at the structure over Long Shoals Road, gradually tapering back to meet existing pavement at the tie-ins.
Public information efforts were coordinated closely with NCDOT division personnel. A temporary traffic radio was set up on the project site to provide the traveling public with real-time information on project activities and proposed traffic shifts. This innovation was presented by Stewart during the proposal stage of the project. The public information activities also included mailings to affected property owners with project updates.
North Carolina Department of Transportation
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