bicycles coming and going
a bicycle with two sets of pedals and two seats
the aggregation of things (pedestrians or vehicles) coming and going in a particular locality during a specified period of time
a wheeled vehicle that has two wheels and is moved by foot pedals
buying and selling; especially illicit trade
trade or deal a commodity
social or verbal interchange (usually followed by `with')
the amount of activity over a communication system during a given period of time
