This appendix provides a selection of case studies of ground access and internal mobility solutions at airports in the United States and abroad. For each mode or technology, at least one airport case example is described and analyzed to provide an overview of how such modes can be implemented in an airport environment.
There are numerous examples of airports that have demonstrated successful planning and integration of micromobility services. Some examples are provided below:
Source: Port of Portland (2014)
One of the most popular forms of public transportation at airports is buses. The transit authority of New York City, Metropolitan Transportation Authority (MTA), provides bus services all around the city, especially to LaGuardia Airport (LGA) and John F. Kennedy International Airport (JFK). The bus network is also connected to the subway and rail networks. At LGA, there are 6 regular buses connecting the three terminals to Manhattan and Queens (Figure 91). One-way ticket fare, like any MTA buses or subways, costs $2.75. Buses are operating every day with a connection every 20 minutes, and the service is not stopped for certain routes. At each terminal, the bus stops are located on the curb fronts at the departure levels.
BRT networks are implemented at several airports across the country. King County Metro, the transit agency of King County, Washington, operates a BRT network of 6 routes, with two lines connecting southern cities of the county and Seattle to Seattle-Tacoma International Airport (SEA). The first route, A-Line, was implemented in 2010 and runs on a mix of dedicated lanes and mixed-traffic roadways along the state highway. The BRT line is in continuous service every day, with a connection every 10 minutes from 7 a.m. to 6 p.m. Frequency is lower after those hours. One-way adult fare costs $2.75. At SEA, the BRT stop is on International Boulevard, adjacent to the SEA Light Rail Station, as shown in Figure 92. Passengers have to cross the boulevard via a sky bridge to enter the SEA Light Rail Station, which is connected to the 4th floor of the parking garage. Then, passengers need to walk for around 10 minutes through skybridges to access the terminal area.
Source: Ronald Reagan Washington National Airport (2024)
At this date, there is no LSAV network at U.S. airports used as public transportation. However, several airports are considering such a transportation mode and have accommodated pilot tests. This was the case at Austin-Bergstrom International Airport, which tested an LSAV shuttle from the rental car facility to the terminal in 2019. This 6-month project evaluated the capabilities of an LSAV shuttle as a form of public transportation. The tested vehicle was an EasyMile EZ10Gen-1, capable of carrying 10 to 12 passengers.
A few case examples of existing PRT systems are currently operational at airports. Additional examples of PRT systems that are not operating at airports are also provided below:
Some metropolitan areas with heavy rail systems in the United States have extended them to the airports that serve them. WMATA’s Blue and Yellow metro line services stop at Ronald Reagan Washington National Airport in Arlington, allowing travelers to access most of Downtown Washington, DC (Metropolitan Washington Airports Authority 2021). The Metrorail station is located on a dedicated structure between the passenger terminal and the parking garages; these three structures are connected through twin elevated walkways between the departure and arrival levels, as depicted in Figure 93. Trips to DCA are not subject to an airport-specific charge—Metrorail pricing is instead defined by both the distance traveled and whether the trip takes place during peak or off-peak hours.
Heavy rail may also be a part of a multimodal strategy for airport ground access. Access to JFK in New York City is possible by traveling by subway to either the Jamaica (north) or Howard Beach (west) stations and then transferring to the AirTrain automated people mover (APM) toward the airport’s terminals (Figure 94). While the subway charges a $2.75 flat fare throughout its network, access to/from the AirTrain from subway stations requires an additional $8 fee, but usage of the AirTrain between the airport’s facilities is free (John F. Kennedy International Airport 2022).
Light rail permits access to multiple airports in the United States. Seattle-Tacoma Airport is served by Sound Transit’s 1 Line, with the station connected to the airport’s terminal through the parking garage and a series of elevated walkways (Port of Seattle 2020)—this interface is
Source: Google Earth, retrieved 2021
depicted in Figure 95. Service to/from the airport does not incur an airport-specific surcharge. Instead, Sound Transit fares are calculated regarding distance traveled—a trip to/from the airport may cost between $2.25 and $3.50 at standard adult fares (Sound Transit 2022).
Pedestrian access between airports and their light rail stations may not be possible at all locations, such as at Los Angeles International Airport (LAX). Current access to LAX occurs through the C Line at the Aviation/LAX station, southeast of the terminal complex—the airport provides a free shuttle bus service between the arrivals area at the airport and the light rail transit (LRT) station (Los Angeles International Airport n.d.). This is a provisional solution for light rail ground access, as simultaneous development of the Crenshaw/LAX transit project and the LAX APM—both shown in Figure 96—will expedite access to the airport (LA Metro n.d.).
Commuter rail can provide access to airports that are further away from city centers than those served by heavy or light rail. Baltimore/Washington International Thurgood Marshall Airport, which lies between Baltimore and Washington and has become a focus city for low-cost carriers, can be accessed through the MARC commuter rail system, as neither the Baltimore Metro SubwayLink nor WMATA’s Metrorail ranges extend to that location. Passengers can reach the airport through trains departing from Washington’s Union Station and Baltimore’s Penn Station by paying a distance-based fare, with a premium being levied during peak hours. Access between the commuter rail station and the airports’ terminals is provided as a free bus shuttle operated by the airport.
Tri-Rail in South Florida is a unique example for airport ground access. Not only does it link three different airports within a single line, but access between each airport and its corresponding
Source: John F. Kennedy International Airport (2022)
Source: Google Earth, retrieved 2020
station is complemented by different modalities. At Miami International Airport, the Tri-Rail stops at the airport’s ground transportation center, where passengers may ride an APM to the terminal; at Fort Lauderdale, a complimentary bus service connects passengers to/from the terminals. The Palm Beach connectivity example goes a step forward, offering passengers a free Uber ride between the rail station and a specific area around it that includes the airport.
Currently, the only existing example of intercity rail or high-speed rail connecting with air transportation is Amtrak. There are five direct air-to-rail connections in existence in the United States since Florida’s Brightline recently opened the MCO station in 2023. Included in this section are examples of intermodality between intercity rail or high-speed rail and access to or egress from an airport. Not all examples are direct air-rail connections, and some feature multiple modes of transit connecting intercity/high-speed rail with airports.
Source: LA Metro (2022)
Source: Photo by Charles Fulton, 2015
Source: Newark Liberty International Airport (2022)
Source: California High-Speed Rail Authority (2021)
Hyperloop systems, though in the initial stages, have been considered by some states as a transit solution to connect airports with other regions. Some examples of potential U.S. airports are as follows:
Outside of the United States, other countries have shown interest in integrating hyperloop systems with their various airports as well.
Maglev technology uses electromagnets to levitate and propel a train or pod, thereby reducing friction to zero and creating a faster mode of transportation. Maglev was developed in the United States in the 1960s and is similar to how hyperloop pods are anticipated to be propelled through the tubes. Since the inception of this technology, there have been proposed projects to incorporate the system into airports as an additional mode of transport in the United States. Some of the proposed maglev projects connecting to airports are:
Maglev has international recognition, with some countries having a fully functional maglev transport system. Japan, Korea and China have operational systems, while other countries, like India, are still in the proposal stages. Two examples of operating maglev systems are provided below and include connections to airports.
As of today, there are no airports with direct connection with aerial cableway transportation. In La Paz, Bolivia, passengers can travel to the airport using the public transportation network, which includes these cable cars. Figure 100 shows the routes that are available for passengers from the airport to the city. Implementing this mode of transportation at an airport could be promising. A cableway system could move 2,400 p/h/d (passengers per hour per direction), greater than a three-car LRT system running at 15-minute intervals, which could carry an estimated 1,800 passengers at the same time. This system lowers the risk of delays for passengers arriving through this system and increases overall efficiency. The entire structure can operate using a single electric 500-horsepower motor, which could reduce greenhouse gas (GHG) emissions compared to other transportation modes. Cabins provide level boarding to meet ADA requirements and to enable boarding and alighting for passengers with mobility devices. Boarding the gondolas is easy, even in a large power wheelchair. Station staff will fold up one or both seats inside the car to make room, and they can slow (or stop) the gondola’s movement to ensure a safe boarding process. In addition, the minimal footprint required to operate the skyway could result in reduced right-of-way impacts and less impact on sensitive habitats compared to different modes.
There have already been successful implementations of these cableways in the urban context in the United States, including the Portland Aerial Tram (Portland, Oregon) and the Roosevelt Island Tram (New York, New York). Interest in aerial cableway technology has grown considerably in the United States in recent years. Initial feasibility studies have been completed in other U.S. cities, including San Diego, California; Washington, DC; and Brooklyn, New York.
The San Diego International Airport could be the first airport-based aerial cableway system in the U.S., as the County of San Diego officials weigh the possibility of introducing gondolas as an alternative to rail or private vehicle transportation. A study by WSP (2018) evaluated the feasibility of building an aerial cableway system between the San Diego Convention Center and San Diego International Airport, the busiest single-runway airport in the United States (Figure 101).
The San Diego International Airport has a desire for growth, and they are looking for the opportunity to integrate a cableway station with the design of the new terminal. The study involved evaluating potential alternatives, ridership, and capital and operating & maintenance (O&M) costs.
Source: WSP (2018)
Urban aerial cableways could gain more attention as a convenient and economical people mover that provides economic benefits. It allows the potential of growth even within constrained environments or where a cableway could extend existing transit lines.
Although it is rare to see airports connected by water transportation, two U.S. exceptions should be noted. The first one is at Boston Logan International Airport, served by private water taxis and offering on-demand services to the entire Boston waterfront at 25 locations, as depicted in Figure 102. The boat dock is located southeast of the airport, near the Hyatt Regency Hotel. Boston Water Taxi operates seven days a week, from 8 a.m. to 8 p.m. Several ticket types are available, ranging from $10 to $45: one-way, child one-way, one-way plus luggage storage, and roundtrip plus luggage storage. To connect passengers from and to the terminals, a free airport shuttle is provided. Boston Water Taxi has two types of vessels with a passenger capacity ranging from 20 to 25 passengers.
The second airport example is Ketchikan International Airport in Alaska, located on Gravina Island and accessible only by ferry from the city (Figure 103). The ferries operate every day from 6:15 a.m. to 9:30 p.m., and they leave the city on the quarter hour and the airport side on the hour and half hour. Passenger fares costs $6 for a one-way trip but can be used as a return trip if used the same day. The ferries can also transport vehicles, with fares ranging from $3 to $38. When passengers are disembarking ferries on Gravina Island, a canopy connects the docking area to the passenger terminal.
A benefit of increasing the ground access options at an airport is that the airport itself can become a multimodal hub; this is being observed through landside renovation/renewal projects. These multimodal hubs can be either standalone facilities or be integrated into the airport’s terminals or existing landside development (such as parking structures). Multimodal facilities at airports currently tend to be served by bus and rail services, but planning for emerging technologies, such as advanced air mobility, is becoming possible as these technologies mature. The availability and integration of different modes of transport ultimately depend on the airport and regional transport strategies:
Source: Boston Water Taxi (2022)