I can answer this question correctly. My brother is a MPS cop in downtown for the 1st precinct.
*Only commercial vehicles can pass the barrier and only when they first put up the barrier and can stay until they get passengers. Once inside the barrier they give you a little time to retrieve until everyone must exit. All cars (taxis and limos).
On 2nd Ave behind the bars they can pass through to exit and don't have to be forced on to the freeway. This rule only applies to taxis and limos and doesn't include rideshare companies. You might fool a traffic controller but cops will not be fooled by Uber or Lyft stickers otherwise anyone could just put a sticker on their window and bypass the barriers. You can't fool commercial plates.
*As I already stated you are NOT a commercial vehicle and are NOT allowed down Nicollet Ave or any other restricted lanes like west bound Marquette or bus lanes and you do NOT carry commercial insurance. I've seen cars pulled over on Nicollet trying to cut around and been pulled over. It's a ticket. If you hit a biker or pedestrian while trying to Uber or Lyft in a restricted lane you can kiss your freedom goodbye...and your "job" and insurance. Big time trouble. This is exactly what my brother told me so I highly suggest you take an officers word over anyone's. It's also against policy and we were told about it in the online video.

And like others said, avoid bar close. That's when trouble happens, too many drunks on the road, passengers puke in your car, crank your speakers and blow them and rate you low. #notworthit