Vancouver Skytrain is also a people mover! It uses the same vehicles as JFK Airport's AirTrain (below):

Vancouver's Skytrain comes every 2-6 minutes all-day, vs. every 7.5-15 min on SD Trolley.

The result? Skytrain gets 4x the Trolley's ridership, despite Greater Vancouver having less people than SD County.

Here's Tokyo's 9.1-mile metro rail line--once again using Mitsubishi people movers to serve a dense, urban area. These trains can carry 600 passengers each!

But People Movers aren't just for airports! Here's the same people mover vehicles seen at Dulles Airport--except here they're serving a dense, urban area in Singapore:

People Movers are driverless trains. They often shuttle airport passengers between terminals, as shown below in DC Dulles:

Fortunately, none of the Automated People Mover (APM) options being considered merge onto existing Trolley tracks. So the APM will not further limit Blue/Green Line frequency.

Why will the Airport Trolley limit frequency? Because it'll merge onto existing Blue/Green Line tracks, creating a bottleneck:

Problem with Airport Trolley: It'll limit Blue, Green Line frequencies to 7.5 min each, according to pub-sandag.escribemeetings.com/filestream.a...