frequentflyer wrote: ↑Wed Jul 24, 2019 11:45 am Impressed by the details. Designing the rails to be low impact visually, and low maintenance. Why more cities ( hey Austin,TX.) not look into this is beyond me.One of the largest issues with systems like these is the vendor lock-in. There is usually no way to contract for repairs or parts replacements with anyone but the original builder and the system may have to be torn down and replaced if they ever want to replace the trains. Compare AirTrain JFK to AirTrain EWR. EWR is going to be torn down at the end of its useful life, whereas it will always be possible to get a train running on 750V third rail, 4' 8.5" (even if they abandoned SelTrac and the aluminum propulsion strips).