Book excerpt: "TRB Special Report 319 analyzes the ways that innovative transportation services--including ridesharing, carsharing, bikesharing, and microtransit--are changing mobility for millions of travelers. Such services could reduce congestion and emissions from surface transportation if regulated wisely to encourage concurrent, instead of sequential, ridesharing. Rapidly growing transportation network companies (TNCs), such as Uber and Lyft, however, are disrupting conventional taxi and limousine services and are raising policy challenges related to personal security and public safety, insurance requirements, employment and labor issues, and accessibility and equity. The committee's report offers guidance to state and local officials responsible for policy setting and regulation of for-hire transportation services in each of these areas. The report also addresses the need for greater consistency in regulations across jurisdictions and calls for TNCs to share more information about the volume, the frequency, and the types of trips they are providing, to allow for informed regulation and planning of transportation services"--provided by publisher.