Columbia is a planned community in Howard County, built as a collection of villages around a central Town Center and Lake Kittamaqundi, about halfway between Baltimore and Washington. US 29 runs north-south through the middle of Columbia, connecting it with Ellicott City and Silver Spring. MD 32 crosses the south side toward Fort Meade and Clarksville, MD 175 runs east toward Jessup, MD 100 skirts the north edge toward Glen Burnie, and I-95 runs along the eastern edge between Baltimore and Washington.
Inside Columbia, the roads are designed around the villages rather than a grid. Little Patuxent Parkway loops around Town Center, and Broken Land Parkway, Snowden River Parkway and Governor Warfield Parkway connect the villages. Each village has its own village center with shops and parking, and neighborhoods are tucked off winding roads into clusters, courts and cul-de-sacs. That layout makes Columbia quiet and green but confusing for first-time visitors, so clear directions and a village name help a mechanic find you quickly. Many townhouse courts have shared, numbered parking and limited guest spaces, so mention the court name and space number too.
BWI Thurgood Marshall Airport is a short drive east. The Regional Transportation Agency of Central Maryland runs buses across the county, and commuter buses run to Washington and Baltimore. Most people drive, though, and many commute long distances on US 29, MD 32 or I-95, so a repair done in a driveway or office lot saves real time. Commuter lots along US 29 and MD 32 serve the buses and carpools, and cars left there all day see the same cold-morning battery trouble as any park-and-ride.