; (2) what return on investment, if any, was achieved by each program participant; and (3) recommendations regarding whether to expand or discontinue the pilot program. 218. Authorization of appropriations; exit lane security There is authorized to be appropriated to carry out section 44903(n)(1) of title 49, United States Code, $77,000,000 for each of fiscal years 2018 through 2020. 219. Real-time security checkpoint wait times (a) In general Not later than 18 months after the date of enactment of this Act, the Administrator shall make available to the public information on wait times at each airport security checkpoint. (b) Requirements The information described in subsection (a) shall be provided in real time via technology and published— (1) online; and (2) in physical locations at the applicable airport terminal. (c) Considerations The Administrator shall make the information described in subsection (a) available to the public in a manner that does not increase public area security risks. (d) Definition of wait time In this section, the term wait time means the period beginning when a passenger enters a queue for a screening checkpoint and ending when the passenger has begun divestment of items requiring screening at that checkpoint. 220. GAO report on universal deployment of advanced imaging technologies (a) Study The Comptroller General of the United States shall conduct a study of the cost to the TSA or an airport to redesign, if necessary, airport security areas to fully deploy advanced imaging technologies at each airport at which security screening operations are conducted or overseen by the TSA. (b) Cost analysis As a part of the study conducted under subsection (a), the Comptroller General shall identify the costs that would be incurred by the TSA or the airport— (1) to purchase the equipment and other assets necessary to deploy advanced imaging technologies at the airport; (2) to install such equipment, including any related variant, and assets in the airport