The Rental Car Center in downtown San Diego, a $316 million, two-million-square-foot consolidated facility that opened in January 2016, sits at 3355 Admiral Boland Way holds LEED Gold certification from the US Green Building Council and houses up to 19 rental car brands serving San Diego International Airport. Major tenants include Enterprise Rent-A-Car, National, Alamo, Hertz, Dollar, Thrifty, Budget, SIXT, and Fox — all sharing the four-level structure's 5,400-car ready-and-return area, 15 car wash bays, and 72 fueling stations. Sixteen alternative-fuel shuttle buses operated by the San Diego County Regional Airport Authority replaced the 81 individual company shuttles that previously circulated on Harbor Drive, cutting rental-car-related road traffic by more than 75 percent. The facility's stormwater management system channels runoff through seven bioswale filtration ponds, a sustainability standard also reflected in the reclaimed-water wash cycles that tenants like Avis Car Rental run through the building's integrated prep bays. The largest concrete structure in San Diego — poured from 97,500 cubic yards across a 24-acre footprint — the Rental Car Center anchors the airport's north-side development alongside the Terminal 2 parking plaza and the receiving-and-distribution center.