Just get a skateboard or scooter. You can even carry them on in crush conditions, and there's no setup/teardown. I commute 4.2 miles each weekday on a skateboar

Just get a skateboard or scooter. You can even carry them on in crush conditions, and there's no setup/teardown. I commute 4.2 miles each weekday on a skateboard, and I see a few other's doing so too.