Category:Three-tier urban rail system (set of concept drawings)

These are concept drawings of an urban rail system in which the faster trains do not need to stop for changing:
     The tram is the only train type that is not separated from traffic and needs to stop at stations.
     The link slows down to the speed of the tram to allow vertical changing.
     The monorail slows down to the speed of the link to allow horizontal changing.

The low-floor double-decker tram has two main sections suspended between three short carbody sections. In the front main section are stairs between the two floors. In the rear main section is an hydraulic elevator that can move people between the link and both floors of the tram. (This assumes that the top of the cabin can be used as a platform without inner doors.) In the nose are a door and a retractable platform, which lead to the airstairs of the link.

The main cars are drawn with supporting bus wheels, which may be needed to relieve the hinges in sharp curves.
Double-decker trams make more sense with double-decker tram stop shelters, which is why doors are also drawn on the upper floor.
Where the tram drives under the link, it can use its power rail. Where not, it can use a catenary. It should be long enough to bridge gaps between the two.

The link train is basically a chain of guided buses on two concrete rails. The distance between the cars is variable, so the train can contract and expand in curves while it is docked to the monorail. The standard car has the variant with the stairs and that with the nose. The elevator is in a special articulated car that corresponds exactly to the three tram sections below it. Otherwise it would (probably) be impossible to align the elevator shafts.

Left curve with expanded link Right curve with contracted link