In recent years, the deployment of micromobility sharing services (bikes and scooters) has expanded rapidly in cities across the United States. According to the National Association of City Transportation Officials (NACTO), the number of shared bike trips in the 100 largest U.S. cities increased from 321,000 in 2010 to 45.5 million in 2018. Shared scooter trips were added to the NACTO study in 2018. There were 38.5 million shared scooter trips in 2018, representing 46% of the 84 million shared micromobility trips taken last year. View the supporting data.