[volguus zildrohar]

pwp. An at-grade heavy rail subway train only works on a separate ROW from regular street traffic. You couldn't run a subway train on the street with cars. The term subway actually means the tunnel, not the vehicles that use them. There are several differences between subway trains and light rail - pasenger capacity being the biggest among them.

hammer, I should have added that I envisioned BRT as running with hybrid vehicles. Also, I imagine any option as being higher capcity which is something I equate more with BRT in my mind than any other type of non-rail surface transit - at least as I've seen it in other cities.