Houston International Airport has two ways to move between their terminals. The subway runs below ground in a circle to provide transportation between all stations; the subway exists without the security gates. IHA also have a skyway, a train that run in a circle between all its terminals that is within the security limits. I think this airport is a good design because the airports shuttle system gives way for very efficient and frequent transfers between terminals. Because these lines run in a circle, passengers aren’t likely to get lost. The airport also circumvents a main issue: having to have people transfer between stations without having to go through airport security all over again.
