Park? Doable.
Crossing a street? Are you prepared for the Olympics? It's quite the obstacle course. First, there is the huge mounds of snow. Most are only three feet high now. Then, there is that layer of slush hiding under it because the melting is seeping into the sewers along the gutters. Make sure absolutely no cars are coming, because their joy in life is splattering you. Then all you have to do is cross six lanes of traffic in 20 seconds without slipping on the ice, getting mowed down by the idiot who picked parking on the center line before the storm, but NOW, (and I mean right NOW, not to be slowed down by some mere pedestrian or smaller vehicle), he has to gun it to get out with his 4-wheel drive truck, get up over that next pile of snow with slush hidden below and safely back to the sidewalk that may, or may not be shoveled yet. All this three days after the storm.
Now, you can't go off in your vehicle because 4-wheel drive guy will take you out too. (Unless your vehicle is a tank, or a bulldozer. Guess what I want for next Christmas. lol)
Buses? You need a crash course in how to read the legend on the page to figure out IF the bus is running. (210 buses run throughout the city, but only 5 of them ran yesterday, and modified schedule along with various detours, simply because 4-wheel guy did wipe out a car here or there so there is no way around the car now.)
There are cabs, if you can find one. (You can only find one when you're not looking for one. Even the taxi queues are gone.) Don't bother calling, because the wait just to get through is half an hour and then another 25 minutes to talk to the dispatchers. They have an app for that though (and will tell you that once every 30 seconds, if you call, just to make sure you really really know that), but the reviews are in. Just because you texted it in, doesn't necessarily mean they got it, care, will notify a driver, or the driver can actually get to you. And if you get a cab, expect driver's choice on where you'll be dropped off. Just because you can see there is a way down any particular street, the driver can always decide he doesn't want to, or he will, but he'll go in the wrong direction.
So, a walk in the park? Wonderful idea, because traveling in this city will drive you mad, even if you live in Russia. lol