Columbia, South Carolina Roadways

Overview of Columbia’s Road Systems

As the capital and second-largest city in South Carolina, Columbia has an extensive network of roads and highways connecting its neighborhoods, downtown area, and surrounding regions. Major roadways in Columbia include interstates, U.S. and state highways, and a variety of arterial and local roads.

Key aspects of Columbia’s roads and highways include:

  • Interstate System: I-20, I-26 and I-77 provide regional connections to Charleston, Greenville, Charlotte and other cities. I-126 links downtown Columbia to I-26.
  • U.S. and State Highways: Major routes like U.S. 1, U.S. 21, U.S. 76, U.S. 176, U.S. 321, SC 12, SC 16 and SC 48 serve local and regional travel.
  • Downtown Streets: A grid network of city streets serves downtown Columbia. Main St., Assembly St. and Gervais St. are important thoroughfares.
  • Local Roads: A network of arterial and local roads connects Columbia’s many neighborhoods.

Below you will find more detailed information on key interstates, U.S. highways, state roads, and local Columbia roadways.

Interstate Highways


I-20 is a major east-west route linking Columbia to Atlanta, Georgia in the west and Florence, South Carolina in the east. Key I-20 interchanges within the city connect to major routes like I-77, U.S. 76/U.S. 378 and U.S. 21.


I-26 enters Columbia from the southwest, providing a connection to Spartanburg and Asheville, North Carolina. It has interchanges with I-20 and several Columbia streets before merging with I-126 into downtown.


I-77 links Columbia with Charlotte, North Carolina to the north. It also connects to I-26 in the southwest via an interchange with I-20.


I-126 connects I-26 from southern and western parts of Columbia into downtown. It ends at an interchange with U.S. 21 and U.S. 221 near the University of South Carolina.

U.S. Highways

U.S. 1

U.S. 1 is a major northeast-southwest route passing through downtown Columbia and linking with neighboring towns. It intersects with I-20 and I-126.

U.S. 21

U.S. 21 (Huger Street) passes through Columbia in a north-south direction, linking downtown with Fort Jackson before leaving the city. It interchanges with both I-20 and I-126.

U.S. 76

U.S. 76 connects Columbia with Greenville and Charleston. Along with U.S. 378 it forms a partial beltway around Columbia. It has an interchange with I-20.

U.S. 176

U.S. 176 links downtown Columbia with I-20 and I-26 to the west. Key intersections along U.S. 176 provide access points into downtown.

U.S. 321

U.S. 321 (Harden Street) passes through Columbia in a north-south direction. It runs concurrently with U.S. 76 between exits off I-20 west of the city.

South Carolina State Highways

SC 12

SC 12 enters Columbia from the southeast, interchanging with I-20 before entering downtown as Devine Street. It continues northwest through the city center towards the university area.

SC 16

SC 16 enters Columbia from the northeast before merging with U.S. 321 as it passes through the city in a north-south direction.

SC 48

SC 48 forms an eastern semi-beltway around Columbia, intersecting with major routes like I-77, U.S. 1, U.S. 21, and U.S. 176.

Columbus Roads and Streets

Downtown Columbia Streets

As South Carolina’s capital city, downtown Columbia features stately government buildings and historic blocks. Main Street, Assembly Street and Gervais Street help form Columbia’s central street grid system.

Motorists should be aware of rush hours, events, and pedestrian traffic which can slow vehicles at times downtown. On-street parking is also limited.

Key Arterial Roads

Major through roads like Beltline Boulevard, Broad River Road, Two Notch Road, and Rosewood Drive help traffic flow around central Columbia and connect suburban areas with the urban core. Most are 4 or 6 lane arterials with signals, turn lanes and high traffic volumes.

Local Neighborhood Roads

Columbia features over 200 neighborhoods and local communities, ranging from central city districts to large masterplanned developments. Most feature standard 2-lane local roads, 25-35 mph speed limits and neighborhood amenities. Traffic is generally lighter than major Columbia roads.

Navigating Columbia’s Road System

For first-time and infrequent drivers, Columbia’s extensive highway system and variety of local roads can pose navigation challenges. Here are some tips to help:

Know Exit Numbers and Key Destinations

Having a basic idea of exit locations, exit numbering and where key routes head into downtown or point to outlying areas helps provide overall geographic orientation when driving Columbia roadways.

Use Navigation Apps or GPS

Navigation apps and in-vehicle GPS systems make getting around Columbia much easier. Voice guidance and dynamic rerouting help motorists find optimal paths. Offline maps keep apps functional when data connectivity is limited.

Allow Extra Time in Heavy Traffic Areas

During rush hour periods, around major events, and around large shopping destinations like the Vista, major delays are possible. Building in some time cushions helps reduce unneeded stress in congested traffic regions. Leaving earlier or later to avoid traffic crush times can also help.

Driving & Parking Downtown

Heading into downtown Columbia? Expect traffic signals, lower speed limits, limited parking, and more pedestrian activity – especially during the daytime on weekdays or during major events or game weekends. Identifying parking garages close to your destination before arrival makes life much simpler!

Ongoing and Future Road Improvements

Like most growing southeastern U.S. cities, Columbia continues improving its transportation network to provide for the needs of economic growth and its rising population.

I-20 / I-26 Corridor Improvements

Interstate upgrades underway in Lexington and West Columbia help increase capacity at the congested I-20 / I-26 interchange near Columbia Metropolitan Airport. This work also replaces aging infrastructure.

U.S. 176 / I-20 Interchange

The busy U.S. 176 (Broad River Road) interchange with I-20 has also seen major upgrades by the South Carolina Department of Transportation. The $20+ million project significantly enhanced traffic flow and helped reduce the crash rate.

Far-Term Expansions

Long range plans exist to potentially widen parts of I-20, I-26 and I-77 plus upgrade some congested interchanges around Columbia. However no funding is yet in place for future interstate expansions.

Local Road Work

Ongoing local projects also aim to upgrade high-traffic routes like Broad River Road, improve dangerous intersections and enhance Columbia area bridges rated structurally deficient. School safety projects and new signals or turn lanes also continue being added around the greater Columbia area as conditions dictate.

Driving Safety Issues in Columbia

While Columbia’s roads aim to quickly and safely connect the city, several problem areas deserve extra precautions from motorists:

Top Crash Intersections & Segments

The large traffic volumes and high speeds along Columbia’s urban highway network contribute to crash rates above state and national averages. Some key high collision city road areas per data include:

  • I-126 & I-20 (over 280 crashes during the 5 year analysis period).
  • I-77 ramp merging areas (multiple locations along I-77 in Columbia with crash clusters).
  • U.S. 378 & I-20 (congestion contributes to rear-end and merging collisions).
  • Harbison Boulevard overpass (merging and weaving factors from I-26 off-ramps).

Unlit Rural Roads

Fatal crashes occur somewhat frequently along unlit rural Columbia connectors and highways at night according to authorities. Using high beams when appropriate, reducing speeds and increasing following distance is key for safety on those corridors.

Speeding and Aggressive Driving

Aggressive driving behaviors like speeding, tailgating and unsafe lane changes regularly contribute to Columbia’s fatal crashes based on data. Drivers need to follow posted speed limits, keep longer following distance and avoid risk-elevating actions behind the wheel.

Railroad Crossings

Columbia features a high number of at-grade railroad crossings according to officials – with collisions unfortunately occurring periodically. Motorists are urged to slow substantially when approaching tracks, and stop if signals activate or trains are spotted.

By driving attentively, cautiously and courteously, motorists can help decrease the incidence of collisions on Capital City roadways!

Final Thoughts

We hope this overview on roadways and travel in Columbia, SC has provided helpful insights! Navigating any mid-sized region takes some orientation – but being aware

of the major routes, problem areas and best practices makes driving Columbia much simpler.

Key points for visitors to remember include:

  • Getting comfortable with the I-20 / I-26 / I-77 interstates helps provide basic geographic orientation to the region
  • Allowing extra time for congestion or delays during rush periods or around major events helps reduce unneeded stress
  • Downtown Columbia features typical city street grids – so expect signals, pedestrians and limited parking
  • Utilizing navigation apps or GPS provides guidance and helps identify optimal travel paths around Columbia
  • Watching speed, avoiding aggression, and using caution around problem areas and railroad crossings contributes to safer travel

With its central location and proximity to coastal areas and mountain regions, Columbia offers many options for daytrips using the extensive road network. We wish you safe and happy travels discovering all that the city has to offer visitors! Reach out with any other questions on getting around by car in Columbia.

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  • Start out going south on Main Street toward Oak Avenue. Turn right onto Oak Avenue and continue for 2 miles. Take the ramp onto Highway 77 South and drive for 5 miles. Take exit 42 for Slash Pine Road. Turn left onto Slash Pine Road and drive west for 3 miles. Turn right onto Slash Pine Lane. 1012 Slash Pine Ln will be on your left.
  • Begin by heading west on Park Street for 0.6 miles. Turn left onto Elm Boulevard and go straight for 1.1 miles. Turn right onto Highway 77 South and continue for about 8 miles. Use the left 2 lanes to take exit 42 for Slash Pine Road. Keep left at the fork and turn left onto Slash Pine Road. In 2.5 miles, turn right onto Slash Pine Lane. 1012 Slash Pine Ln is on the right side of the street.
  • Start out on Creek View Drive heading south. Drive for 0.9 miles and turn right onto Oak Avenue. Take Oak Avenue across the bridge over the creek and continue west for 1.7 miles. Turn left onto Highway 77 South and stay on it for approximately 7 miles. Take exit 42 for Slash Pine Road. At the stop sign, turn left onto Slash Pine Road heading west. After 2.8 miles, make a right onto Slash Pine Lane. 1012 Slash Pine Ln will be a gray house on your right side.