contain two exit configurations depending on the arriving flight. Domestic passengers and international passengers from airports with U.S. customs pre-clearance exit directly into the concourse, while international arrivals from airports without border pre-clearance are redirected down a sterile corridor to U.S. Customs & Immigration. Passengers arriving from international destinations who are ending their journey at Dulles are then transported by mobile lounge to the International Arrivals Building, while passengers making onward connections are directed to a separate customs facility located on the ground floor of Concourse C. After being screened by TSA at a dedicated security checkpoint within the facility, these passengers then take escalators that deposit them in Concourse C near gate C7. A new and permanent C/D concourse (also called "Tier 2") is planned as part of the D2 Dulles Development Project. The new building is to include a three-level structure with 44 airline gates and similar amenities to Concourse B. The concourse plan includes a dedicated mezzanine corridor with moving sidewalks to serve international passengers. The design and construction of the new C/D concourse has not been scheduled. When built, it is planned that both terminals will be connected to the main terminal and other concourses via the AeroTrain. To that extent, the AeroTrain station at Concourse C was built at the location where the future Concourse C/D structure is proposed to be built, and is connected to the existing Concourse C via an underground walkway. In April 2022, the Airport Authority published plans for a 14 gate Concourse E to be built atop the AeroTrain station with the purpose of replacing outdoor boarding areas at Concourse A. Construction is expected to cost between $500 million and $800 million and the airport is seeking $230 million grants from the Bipartisan Infrastructure Bill. Airline lounges Since many major domestic and international airlines have a large presence at Washington Dulles, there are many airline lounges within the airport: Air France: Air France/KLM Lounge, A Concourse across from gate A22. British Airways: BA Lounge with Concorde Dining for first class and Business class passengers, located opposite the Concourse B Transit station. Capital One is constructing its second airport lounge at Dulles. It will be operated by a third-party hospitality company and is scheduled to open in 2022. Etihad Airways: First and Business class lounge located opposite gate A15. Lufthansa: Senator Lounge and Business Lounge, B Concourse at gate B51. Turkish