I completely understand parents concerns with hwy driving and that is why I haven't done any outings outside of the city.
However, I'm a realist and recognize that there is danger in any situation, not just driving. We've had more close calls walking across the street than in the car. Just yesterday a dcm almost got hit crossing the intersection to come to my house! Thank goodness she was on her way to pick up and didn't have her daughter with her yet!
I've had lots of parents tell me they chose me or want to be on my waiting list because of the outings we do. I'm glad that it is a selling point for me because I love getting out of the house. For those that don't want their child going in the vehicle, I'm not the dc for them and that's okto my knowledge though, it's never been a negative thing which is a good thing because other than parks and one summer restaurant, we aren't within walking distance to anything and I prefer taking my own vehicle with car seats vs the bus. I can only fit 3 in my car though and have considered the bus however for when all 4 are here. The safety of it concerns me though lol. If you use the bus, do you like it??