Columbia sits where the Broad and Saluda rivers meet to form the Congaree, and three interstates wrap around it. I-26 runs northwest toward Spartanburg and southeast toward Charleston, I-20 crosses the north side between Augusta and Florence, and I-77 runs along the east side toward Charlotte. I-126 runs into downtown from I-26, and the interchange where I-20, I-26 and I-126 meet, known locally as Malfunction Junction, is the most notorious in the state and has been the focus of a long rebuilding effort.
Two Notch Road, which carries US 1, runs northeast toward Fort Jackson and the Sandhills, Garners Ferry Road carries US 76 and US 378 east, and Devine Street, Gervais Street and Assembly Street serve downtown and the university. Rush hour on I-26 and I-20 backs up, and a breakdown in the merges around the big interchange is dangerous. Lake Murray Boulevard and Broad River Road carry traffic toward Irmo and the lake, and Bull Street carries traffic north out of downtown past the old state hospital grounds, which are being redeveloped.
Columbia Metropolitan Airport sits in West Columbia, and COMET buses serve the city. The University of South Carolina fills downtown with students, and football Saturdays bring huge crowds to the stadium near Rosewood. Fort Jackson, the Army's largest basic training post, sits on the east side, and its graduation weeks bring visitors from across the country. Benedict College, Allen University and Columbia College add to the student traffic.
For a mobile mechanic, Columbia is mostly driveways and garages. Shandon, Rosewood and the other older neighborhoods have narrow lots under big trees, while Northeast Columbia, Lexington and Irmo have newer homes with attached garages and HOA rules. Student apartments near campus and the housing around the fort have their own parking rules. Lake Murray homes often have long driveways and boat trailers, so the mechanic plans for room to work.