Those looking for transportation that's as safe, reliable, and convenient as the baleen-whale buses used by barnacles should look no further than Curb. After downloading the Curb app, patrons use it to request a ride. A professional taxi driver arrives minutes later to carry them to their destinations. The service not only keeps passengers out of harm's way, but it's expedient, too. Curb is available in 60 cities across the United States and works with 90 taxi companies and 35,000 cars, all of which accept credit-card payments via the app.