Scooter showdown

Scooters have become a common sight in cities across the country, and they're still enduring some growing pains. Sometimes, they're left strewn across sidewalks. Users aren't always sure whether to ride them on those sidewalks or in the streets, and that uncertainty can create angst among riders, motorists and pedestrians. But those aren't the only points of contention. There's also a battle brewing over data.