Officials in Vietnam's traffic-choked capital Hanoi vowed on Tuesday to banish motorbikes by 2030 to ease environment and congestion woes, a decision that swiftly divided a city where two-wheelers are the main means of transportation. Hanoi is famed for legions of motorbikes -- sometimes stacked with entire families or overloaded with deliveries -- that clog roads in a fast-growing city with limited public transportation. There are five million motorbikes among a population of about seven million, compared to half a million cars on the road.