The Capital Airport 2nd Expressway (Chinese: 首都机场第二高速公路), officially numbered S51, is a toll expressway that connects eastern Beijing with Terminal 3 of Beijing Capital International Airport.[1] It opened on February 29, 2008, just prior to the 2008 Beijing Olympics. It runs for 11.5 km from Yaojiayuan Road in Chaoyang District to Terminal 3. It was built to serve the Terminal 3, and to reduce pressure of Capital Airport Expressway, which has been heavily congested.[2][3]
References
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| Projected roads shown in italics | 
| Ring roads |  |  | 
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| Chang'an Avenue (list of sections)
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| Ping'an Avenue (list of sections)
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Linglong RoadChegongzhuang West RoadChegongzhuang StreetPing'anli West StreetDi'anmen West StreetDi'anmen East StreetZhangzizhong RoadDongsi ShitiaoGongrentiyuchang North RoadNongzhanguan South RoadChaoyanggongyuan South RoadYaojiayuan RoadShigezhuang Road (side) /  (main)
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| Guang'an Avenue (list of sections)
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Guang'an Road (side) / G4 Beijing–Hong Kong and Macau Expressway (main)Guang'anmen Outer StreetGuang'anmen Inner StreetLuomashi StreetZhushikou West StreetZhushikou East StreetGuangqumen Inner StreetGuangqumen Outer StreetGuangqu Road
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| Central Axis (list of sections)
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Beichen RoadGulou Outer StreetOld Gulou StreetDi'anmen Outer StreetDi'anmen Inner Street(Split into west and east part near Jingshan, Palace Museum and Tian'anmen Square)Qianmen StreetTianqiao South StreetYongdingmen Inner StreetYongdingmen Outer StreetNanyuan Road(Nanyuan Airport to be demolished)Nanzhongzhou Road (Provincial Highway S228)
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| Qiansanmen Avenue (list of sections)
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Lianshi West RoadLianshi East RoadLianhuachi West RoadLianhuachi East RoadXuanwumen West StreetXuanwumen East StreetQianmen West StreetQianmen East StreetChongwenmen West StreetChongwenmen East StreetTonghui River North Road (side) / Tonghui River North Express (main)
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| Xuanwumen Avenue (list of sections)
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Zhixin East RoadHuayuan East RoadBeitaipingzhuang RoadXinjiekou Outer StreetXinjiekou North StreetXinjiekou South StreetXisi North StreetXisi South StreetXidan North StreetXuanwumen Inner StreetXuanwumen Outer StreetCaishikou StreetKaiyang RoadMajiabao West RoadHuaifang West Road
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| Chongwenmen Avenue (list of sections)
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Beiyuan RoadHuixin West StreetYinghuayuan West StreetHepingli West StreetYonghegong StreetDongsi North StreetDongsi South StreetDongdan North StreetChongwenmen Inner StreetChongwenmen Outer StreetTiantan East RoadPuhuangyu RoadLiuxiang RoadDexian RoadG3 Beijing–Taipei Expressway
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| Other | 
Fengti South Road - Lize RoadG109 - Fushi Road - Fucheng Road - Fuchengmen Outer Street - Fuchengmen Inner StreetChaoyangmen Inner Street - Chaoyangmen Outer Street - Chaoyang Road - Tongzhou - Yanjiao ExpresswayXishiku Street - Deshengmen Inner Street - Deshengmen Outer Street - G6Andingmen Inner Street - Andingmen Outer Street - Anding Road - Anli Road - Litang RoadCaihuying South Road - G45 (To Kaifeng/Guangzhou)Xizhimen Outer Road - Xueyuan Road - Xueqing RoadZizhuyuan Road - Xingshikou RoadWanquanhe Road - Yongfeng RoadHuilongguan-Shangdi Bicycle Lane (cycleway)
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| Expressways | | National Expressways |  | 
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 | Sections of National Highways |  | 
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 | Regional expressways in Beijing-Tianjin-Hebei area
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S3201 Beijing-Pinggu-JizhouS3301 Second Beijing-Tianjin CorridorS3701 Beijing-YuxianS3801 Beijing-ChongliS3501 Daxing AirportS3300 Daxing Airport Northern
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 | Local expressways |  | 
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| National Highways |  | 
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