15-3 运输线路长度（2008—2010年）
Length of Transport Routes, 2008-2010
	单位：公里 (km)
指     标	Item	2008	2009	2010
公路通车里程	Length of Highways with Transport Service	12059	14315	14832
# 等级公路	Expressway and Class I to IV Highway	11225	13431	13851
# 高速公路	Expressway	835	884	982
内河航道里程	Length of Navigable Inland Waterways	412	412	412
民航航线里程	Length of Civil Aviation Routes	35494	40341	68488
输油气管道里程	Length of Petroleum & Gas Pipelines	730	608	542
注：内河航道里程为内河清淤里程。民用航空航线里程为国航天津分公司在天津滨海国际机场起降飞机的里程。
Note: Length of navigable inland waterways refers to length of inland waterways with slit cleaned up. Length of
civil aviation refers to the length of Air China Tianjin Company flights at Tianjin Binhai International Airport.