S37 (Henan)
| Lanxu Expressway 兰许高速公路 | |
| Route information | |
| Length | 120 km (75 mi) |
| Existed | 2005–present |
| Major junctions | |
| Northeast end | Lankao West Interchange connecting   G30 / G1511 in Lankao, Kaifeng, Henan |
 Henan S82 (S82) in Xiangfu District, Kaifeng G45 in Tongxu County, Kaifeng Henan S60 (S60) in Weishi County, Kaifeng G0424 in Weishi County, Kaifeng Henan S42 (S42) in Yanling, Xuchang (under construction) | |
| Southwest end | Xuchang East Interchange connecting  G1516 in Jian'an District, Xuchang |
| Location | |
| Country | China |
| Province | Henan |
| Highway system | |
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The Lankao–Xuchang Expressway (Chinese: 兰考－许昌高速公路), often abbreviated as Lanxu Expressway (Chinese: 兰许高速) and designated as S37 in Henan's expressway system, is a 114-kilometer (71 mi) long regional expressway in Henan, China. Currently it's fully completed.
History
Before July 8, 2024, this expressway was a part of Lannan Expressway (Chinese: 兰南高速公路) which started at Lankao and ended at Nanyang. The first phase of the expressway is from Xuchang to Nanyang via Pingdingshan and was called as Xupingnan Expressway (Chinese: 许平南高速公路). This section was opened on 12 December 2004 and provided expressway connections to the above-mentioned three major cities in Henan.[1] The second phase (Lankao–Xuchang section, called Lanxu Expressway) was opened on 19 November 2005.[2] The third phase was opened on December 19, 2005.[3][4]
The Xuchang–Ye County section has also been designated as G0421.
On July 8, 2024, the latest version of Henan Expressway numbering was released by Henan Provincial Department of Transportation.[5] The previous Henan S83 (Lankao–Nanyang Expressway) was abolished. Instead, the Ye County-Nanyang section was redesignated as G3612, and the name Lanxu Expressway was restored on Lankao-Xuchang section.
Exit list
From northeast to southwest:
| Location | km | mi | Exit | Name | Destinations | Notes |
|---|---|---|---|---|---|---|
 Henan S83 (Lankao–Nanyang Expressway)
| ||||||
| Continues northeast towards Heze as G1511
| ||||||
| Xiangfu District, Kaifeng | 0 | 0 | 0 A-B | Lankao West Interchange | G30 – Kaifeng, Shangqiu G1511 – Heze | |
| 10.8 | 6.7 | 11 | Erlangmiao | File:Henan Expwy S213 sign no name.svg Henan S213 – Erlangmiao, Qixian | ||
| Chenliu Parking Area | ||||||
| Qiulou Interchange | Henan S82 (S82) – Kaifeng, Minquan | |||||
| Tongxu County, Kaifeng | 34 | Zhusha Interchange | G45 – Puyang, Zhoukou | No ramp towards northbound G45 for westbound S83 and vice versa | ||
| 40.9 | 25.4 | 41 | Tongxu |  File:Henan Expwy S222 sign no name.svg G240 (Yingbin Avanue) / Henan S222 – Tongxu | ||
| Tongxu Service Area | ||||||
| Weishi County, Kaifeng | Weishi East Interchange | Henan S60 (S60) – Xinzheng, Shangqiu | ||||
| 59 | 37 | 59 | Weishi | G240 – Weishi | ||
| Weishi South Interchange | G0424 – Zhongmu, Zhoukou | |||||
| Yanling County, Xuchang | 90.8 | 56.4 | 91 | Yanling North | File:Henan Expwy S319 sign no name.svg Henan S319 – Pengdian | |
| 92 | 57 | 92 | Xiefang Interchange | Henan S42 (S42) – Yongcheng, Lingbao | Under construction | |
| Yanling Service Area | ||||||
| 102.2 | 63.5 | 102 | Yanling West |  G311 (Huadu Avenue) – Yanling | ||
| Jian'an District, Xuchang | Xuchang East Interchange | G1516 – Xuchang, Luoyang | Westbound exit and eastbound entrance only | |||
| Continues southwest towards Xuchang as G1516
| ||||||
| ||||||
References
- ^ "许平南高速建成通车_新闻中心_新浪网". news.sina.com.cn. Archived from the original on 2022-10-06. Retrieved 2022-10-06.
- ^ "兰(考)许(昌)高速公路建成通车 总投资50亿元". www.gov.cn. Archived from the original on 2007-01-04. Retrieved 2022-10-06.
- ^ "南邓高速公路昨日通车_新闻中心_新浪网". news.sina.com.cn. Archived from the original on 2022-10-06. Retrieved 2022-10-06.
- ^ "南阳人有能力建"高速"——写于南邓高速公路建成通车之际_新闻中心_新浪网". news.sina.com.cn. Archived from the original on 2022-10-06. Retrieved 2022-10-06.
- ^ "河南省交通运输厅关于印发河南省高速公路网路线命名编号调整方案的通知" (in Chinese). Retrieved 2024-07-18.