Ice and snow aren't what makes life suck in Chicago in January, it's WIND. Since this things does most of it's steering by body tilt contemplate what happens when a big wind smacks you in the face making you lean backwards, last I heard Segway has a reverse. I've seen Chicago winter winds move people around who weren't on a gyroscope steered gocart, when they're motor assisted it's going to be freaking hilarious, until they wind up under a truck and dead. Ok, you've got the script, now all you need is a producer and a wind tunnel.
I'll leave execution of the idea to Jackie Chan, I'm sure he'll be able to do it justice.