A Public transportation system added to the story in my 2015 NaNo novel

A tubular track of Paragangian creation which connects all the major cities of "America" in this time period. It was given to the Earth as part of the deal after the Shattering to allow the paragangian refugees to settle at Earth Station Mexico. The sky road was created in one day and is maintained by the Paragangians. It is a clear [virtually invisible] tubular structure 4 lanes wide through which people are transported in clear bubbles which can be joined together to form larger bubbles for people who are traveling together. Wealthy people own their own bubbles which are fancier and can be used as air cars, anyone can ride the Sky Road and basic bubbles are provided at no cost.