 Streetcars were booked online or by phone, and could be collected and returned at any time using the member's personal smart card and PIN.Usage charges were based on the length of time the client keeps the car, and mileage during the rental (the first 20 miles per calendar day were free) currently zip car offers 40 free miles per day.In June 2009 Streetcar announced that members would no longer have to pay London's congestion charge.