Yup, that's the position my Fiance is in at this moment. She's an RN and works night shift, so she's been driving while "not supposed to". Her hospital doesn't care what's going on, if you're scheduled you have to be at work. Obviously you can call off, but it pisses of every other nurse their, and you get written up. She'll be working extra tomorrow because people will definitely call off. I don't know how or why you would get a ticket if you have to be at work. Most businesses who could shut down, did shut down.
She brought stuff to stay tomorrow if she has to work extra. She doesn't like driving in this weather when she's fully alert, but she hates it even more after working 16+ hours.
Medical personnel are exempt. Even when I ventured off to Walmart this afternoon in my pajamas and slippers, I had my RN ID with me.
It also comes in helpful if you ever get pulled over while in uniform to/from work. Seems like they don't give you tickets as long as it's not outrageous-no idea if the blue here are more friendly to uniformed types or not.