SkyTran uses off-the-shelf parts
and civil engineering principles already proven in monorail and light rail systems.

The paradigm shift
is in how mass transit is designed with those parts. Instead of defining the "mass" as large groups moving in large vehicles stopping repeatedly at relatively  few destinations...

SkyTran moves tiny clusters
of people (1 or 2) non-stop across a network of many more destinations in a fleet of small vehicles. 

Mass transit becomes personal transit
Fast, private and convenient.