I called the Roadside Assistance number to see how it works.
I had to go through about three different menu trees, plus listen to "May be monitored or recorded" and greetings in Spanish. I wouldn't want to go through that at the edge of a busy highway.
It would be good to have one number just for initiating roadside assistance. I know, unlikely to happen.
BTW, after you call 1-877-NOGASEV (1-877-664-2738) press 1 and then press 1. They require your VIN. I'm putting that info on a card in the car.