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休斯敦是美国第四大城市。2013年,该市人口约220万,仅次于纽约、洛杉矶、芝加哥,市区陆地面积约1500平方公里,人口密度仅有每平方公里1400人。而大休斯敦都会区人口约630万人,陆地面积共23000平方公里。由于低密度的土地开发和极度分散且严重郊区化的居住人口分布,休斯敦市居民平均出行距离超长,且早晚交通高峰期间交通量方向分布严重不均,城市公共交通极其落后。据统计,在休斯敦71.7%的居民都是独自一人开车上班。完全基于小汽车且低承载的出行方式,导致休斯敦市交通拥堵严重,汽车尾气浓度相当高,成为美国交通拥堵及空气污染最严重的城市之一。
Houston is the fourth largest city in the United States. In 2013, the city’s population was about 2.2 million, second only to New York, Los Angeles and Chicago. The urban area covers an area of about 1,500 square kilometers and the population density is only 1,400 people per square kilometer. The Greater Houston Metropolitan Area has a population of about 6.3 million and a land area of 23,000 square kilometers. Due to the low density of land development and the extremely scattered and heavily suburbanized population distribution, the average distance traveled by residents in Houston is extremely long, and the distribution of traffic volume in the morning and evening rush hour is seriously uneven. The urban public transport lags far behind. According to statistics, 71.7% of residents in Houston are driving alone to work. Being entirely car-based and low-load travel, Houston has had serious traffic congestion and high vehicle exhaust concentrations, making it one of the most traffic-jammed and air polluted cities in the United States.