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Carolina Crossroads Phase 3C Virtual Meeting

Phase Overview

Map showing the I-20 Phase 3C widening area with nearby roads, interchanges, and locations of bridge replacements and future improvements.
  • Replacement of I-20 bridges over Saluda River and CSX railroad
  • Widening I-20 to accommodate future lane additions in later phases. Future lanes will open in coordination with Phase 3E.
  • Phase 3E will also include a new interchange at Bush River Road and a ramp improvement from I-20 WB onto US 378.

Stages of Construction

Maintenance of traffic diagram for Construction Stage 1 of the I 20 widening between Bush River Road and US 378. The figure shows both directions shifted inward toward the center median to create work zones on the outside shoulders. Westbound and eastbound each operate with six 11 foot active lanes total, three in each direction. Temporary concrete barriers line both edges of the work zones, with existing concrete median barrier remaining in place. Reduced shoulder widths are shown, including 5 foot and 6 foot interior paved shoulders and narrow 2 foot buffers near the barriers. Traffic arrows illustrate the inward shift within the constrained work zone environment. Color coding highlights paved shoulder, work zone areas and active lanes.

Stage 1: In this stage, all existing lanes will remain open, but slightly narrowed, to create space for shoulder work. Crews will begin constructing the new bridges beside the existing ones, adding new outside pavement, and installing the eastbound noise wall. A temporary eastbound exit ramp to Bush River Road (Exit 63) will keep traffic moving while the permanent ramp is rebuilt, and work will begin on the westbound entrance ramp.

Maintenance of traffic diagram for Construction Stage 2 of the I-20 widening between Bush River Road and US 378. The figure shows both directions shifted outward to allow construction activities in the median area. Westbound and eastbound each operate with three 11 foot active lanes, maintaining reduced but functional lane widths. Temporary concrete barriers separate traffic from both the median work zone and the outside shoulders. Paved shoulders alternate between 2 foot and 3 foot widths depending on the side. Outward directed arrows mark where traffic is redirected away from the median to create space for median construction. Color coding identifies paved shoulder, work zone areas, and active lanes.

Stage 2: In this stage, traffic will move to the new widened outside lanes, opening the median for construction. Crews will replace the median barrier, install drainage, and build the center sections of the new bridges. When work is complete, traffic will shift into the new alignment, with new pavement markings and signs.

Final Configuration

Final typical section of I 20 widening between mile markers 62.0 and 62.4. The section shows westbound and eastbound lanes separated by a 2 to 4 foot concrete median barrier. Westbound includes three existing 12 foot lanes, a 10 foot paved shoulder on the outside, and a 4.75-foot inside paved shoulder. Eastbound includes three newly constructed 12 foot lanes, a 12 foot inside paved shoulder, a 12 foot outside interim paved shoulder, and a 12 foot future paved shoulder. Temporary barriers are shown near construction zones. Color coding differentiates existing paved shoulders, existing lanes, paved shoulder, interim paved shoulder/future lane, future paved shoulder, and future lanes.
Final typical section of I 20 between mile markers 62.7 and 63.0. The section shows westbound and eastbound lanes separated by a 2 to 4 foot concrete median barrier. Westbound includes four 12 foot lanes, a 12 foot outside paved shoulder, and a minimum 12 foot inside paved shoulder. Eastbound includes three 12 foot lanes, a 12 foot minimum outside paved shoulder, a 12 foot interim inside paved shoulder, a 12-foot future lane, a temporary concrete barrier, and two 12 foot future lanes on the outer edge. There is a 12-foot future paved shoulder along the outside and a noise wall is shown on the outer right side. The traveled way width varies between 36 and 72 feet depending on the location. Color coding distinguishes paved shoulders, interim paved shoulders/ future lanes, future paved shoulder, newly constructed lanes, future lanes and a noise walls.
Final typical section of I 20 westbound and eastbound between mile markers 62.4 and 62.7. The layout shows multiple 12-foot lanes, paved shoulders, and future lanes. A 2-to-4-foot concrete median barrier separates westbound and eastbound traffic. Westbound includes three 12-foot lanes with paved shoulders on each side. Eastbound includes three active 12-foot lanes, a 12-foot interim paved shoulder, and two 12-foot future lanes on the outer side. A temporary barrier is placed between the interim shoulder and the future lanes. A noise wall appears on the far right. Color coding differential paved shoulders, interim shoulder, and newly constructed lanes, and future lanes.
Final typical section illustrating I 20 eastbound and westbound between mile marker 63 and the eastbound off ramp to Bush River Road. A 2 to 4 foot concrete median barrier separates the eastbound and westbound sides. Westbound includes 12-foot paved shoulder, one 12 foot future travel, four 12-foot newly constructed lanes, and a 12-foot minimum inside paved shoulder. Eastbound includes three newly constructed 12-foot lanes, 12-foot painted median, 16-foot Bush River Road Exit ramp, a 12- interim paved shoulder, and two 12-foot future lanes, a temporary concrete barrier separates the last two lanes, and then there is a 12-foot future paved shoulder. Color coding differentiates paved shoulders, interim paved shoulder/future lanes, future paved shoulder, newly constructed lanes, and a painted median.

Aerial Map

=Aerial map of the I-20 Phase 3C project showing the project area, new and existing right-of-way, widened median, noise walls, and new bridges over the CSX railroad, with nearby roads and the Saluda River labeled.
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