Several cities are experimenting with applying fees to parked e-scooters as means of managing the devices and helping to prevent an over-distribution of them on streets. Omaha, Neb.; Charlotte, N.C.; and Detroit are part of a three-month pilot organized by the parking technology platform Passport to assess parking fees when scooters are not being ridden. The idea behind the effort is to discourage scooter operators from releasing too many of the devices, which could spend most of their time parked on sidewalks.