 DoorDash says it's stepping up efforts to identify drivers who break the law and kick them off the platform. It comes after city leaders in Boston complained of an increase in food delivery drivers who are speeding, running red lights and driving on sidewalks. DoorDash says it's starting its crackdown in Boston and might expand it to other cities. The company says it will also work with several cities where a large number of delivery drivers have been caught using unregistered motorcycles and scooters.