The Badaling Expressway (Simplified Chinese: 八达岭高速公路, Traditional Chinese: 八達嶺高速公路, Hanyu Pinyin: Bādálíng Gāosù Gōnglù) is an expressway in China which links urban Beijing to the Badaling stretch of the Great Wall of China. It continues toward Yanqing and leaves Beijing, becoming the Jingzhang Expressway. Starting north of Madian Overpass on the Northern 3rd Ring Road, it runs for approximately 50 kilometres in a direction toward Beijing's north-west. The Badaling Expressway gets its name from the Badaling stretch of the Great Wall. History The expressway was constructed in January 1996 in three stages, culminating in the creation of a 69.98 kilometre long expressway in September 2001. The previous expressway did not link with the Jingzhang Expressway. After the linking was complete, the stretch to Yanqing and Kangzhuang was opened, and the toll gate at Juyongguan was put out of service soon after. Road conditions Warning Kilometre sections 49-50 heading out of Beijing are areas where fog may occur. The same applies for the stretch between Shahe and Xisanqi, especially at night. The Valley of Death (see relevant part of this article) is a (potential) speed trap and a black spot for traffic accidents. Other speed traps are around the area leaving urban and part of suburban Beijing. Speed limit Before Qinghe Toll Gate, maximum 80 km/h; after Qinghe Toll Gate, maximum 100 km/h. (60 km/h only in mountainous area between Nankou and Badaling; heavily enforced heading into Beijing in "Valley of Death".) In cases of rain, snow or fog, a maximum speed limit of 60 km/h for the stretch southeast of Nankou applies (40 km/h northwest of Nankou). Most bridges southeast of Nankou have a maximum speed limit of 80 km/h but this is neglected by all and enforced by virtually none. Speed checks are concentrated in the Madian - Bei'anhe area and get less after that, but are notoriously plenty in the "Valley of Death" part of the expressway from Badaling to Nankou, heading into Beijing. Tolls CNY 0.5/km as of 5th Ring Road intersection for sections south of the toll gate. (The 5th Ring Road intersection is free only for vehicles heading north toward Badaling.) Entire stretch north of the 5th Ring Road to Kangzhuang costs CNY 35 (price for small passenger cars). Networked with 6th Ring Road toll system, but not with Jingzhang Expressway system. Lanes 6 lanes (3 up, 3 down) from Madian - Nankou; 4 lanes