The Coliseum–Oakland International Airport line, also known informally as the BART to OAK line, is an automated guideway transit (AGT) system operated by Bay Area Rapid Transit (BART) between BART's Coliseum station and Oakland International Airport station. The route is colored beige on BART maps, and BART has also referred to this route as the Beige Line. The system opened for revenue service on November 22, 2014 and is integrated into BART's fare system. During planning and construction, it was known as the Oakland Airport Connector (OAC) project.