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38 that would be required to accommodate large elevators may not pass the benefit-cost analysis as the existing escalators most likely satisfy the need for assisted vertical transporta- tion. Retrofitting parking structures with elevators is equally challenging. Consolidated Meeters-and-Greeters Area Meeters and greeters were affected greatly by the changes in security regulations following the September 11, 2001, ter- rorist attacks. Before these changes, meeters and greeters could pass through security and meet passengers at the gate and then accompany them to claim their bags or proceed di- rectly to their vehicles. Today, meeters and greeters typically wait in their vehicles for a telephone call (via cell phone) from the arriving passengers they plan to pick up. Sometimes, cell phone lots are provided for waiting meeters and greeters, re- ducing unnecessary recirculation, emissions, and roadway congestion. However, meeters and greeters present a valuable revenue stream that is minimized by the use of cell phone lots. A common factor complicating the meters-and-greeters process is that multiple exits are typically provided from the secure area to the arrivals hall (see Figure 4-16: "Multiple Exits"). While multiple exits help distribute passenger traffic, they make it difficult for meeters and greeters to know where to meet passengers as they enter the arrivals hall. A consolidated meters-and-greeters area (see Figure 4-16: "Consolidated Meeters and Greeters") not only would simplify the act of meet- ing and greeting arriving passengers by creating a single exit Figure 4-16. Consolidated meeters-and-greeters area. from the secure area to the arrivals hall, but also would capture this potential revenue stream. A single exit from the secure meters-and-greeters areas. Claiming checked baggage is often a area into an arrivals hall that serves one or more airlines, sim- difficult task for the elderly and the disabled, who have a hard ilar to international arrivals, would allow meeters and greeters time removing baggage from slope-plate claim devices. These to arrive at the terminal without contacting the arriving passengers would greatly benefit from a single exit from the party to ascertain which bag-claim device their flight has been secure area to the arrivals hall by being able to meet the peo- assigned. As there would only be one exit, the meeters and ple picking them up before they claim their checked baggage greeters could go directly to the single exit and wait for their rather than meeting them at the curb. Another driver is the parties to arrive. This dwell time provides a natural opportu- number of exits that have to be monitored by airline or airport nity to provide concessions and other amenities, such as bag- personnel. When exits are located remote from the SSCP, gage carts or restrooms. The meeters and greeters could also either the airlines using the arrivals hall or the airport opera- use revenue-producing short-term parking rather than waiting tor must provide security guards to monitor the exit, even if in a no-fee cell phone lot. automated revolving doors are installed. Consolidating the number of exits from the secure area to each arrivals hall would reduce the cost of providing that security. Key Drivers Increased nonairline revenue is a significant advantage of Examples providing consolidated meters-and-greeters areas. At many airports, meeters and greeters represent a revenue source Most terminal buildings have either multiple domestic that is not being captured because there is no central location arrivals halls or multiple portals in a single domestic arrivals where they can meet their parties. The increasing numbers hall because of its size. In contrast, international arrivals facil- of aging passengers are another driver of consolidated ities typically have a single exit into the nonsecure area. These