New York City Mobile Testing Vans

I’ve read in various posts about mobile testing vans scattered around New York. I’m going there in a few weeks for a weekend. I just wanted to confirm do they still have these vans? Is there a listing somewhere showing their location? Do they do rapid antigen tests and do they give you a printout or email that is good for travel?

I was going to go the switch health telehealth route but if it’s easy and free to use these vans then I’d rather save my money!

Thanks!