Your unsubstantiated assertion that streetcars cause congestion is especially ironic since congestion is defined as too many automobiles. Streetcar stops cause congestion? Cars stop too. They stop to load and unload passengers, queue into parking garages, yield to pedestrians as they turn, sometimes they just stop because the street is so full of cars that they have no place else to go. Hopefully someday you will recognize that automobiles aren't the only legitimate form of transportation and the inconvenience alternative modes of transportation cause motorists pales in comparison to the danger and inconvenience motorists cause themselves and everyone else.