Omaha is a Midwestern city and is therefore no stranger to urban sprawl, being designed primarily to be navigated by car. Thus, a rental car is the most convenient option for getting around. A fairly comprehensive fixed-route bus service is provided by Metro Area Transit, however, travellers should note that many bus routes only operate on weekdays. In the central downtown area, walking is a pleasant option when shopping and dining in the Old Market area, attractions like the riverfront and the Convention Center and Arena can be reached on foot. However, taxi availability can be erratic, and for sightseeing outside this downtown area, a car is best.