The Airport Expressway (Chinese: 机场高速公路; pinyin: Jīchǎng Gāosù Gōnglù), officially the S12, is a controlled-access highway in Beijing, China, which links central Beijing to the Beijing Capital International Airport.
It is just under 20 km in length.

Opened in 1993, the expressway links Sanyuanqiao on the northeastern 3rd Ring Road to Beijing Airport.
Another expressway, the 2nd Airport Expressway, was built in 2008 prior to the Beijing Olympics to serve traffic from the city to the airport.
The Airport Expressway (Chinese: 机场高速公路; pinyin: Jīchǎng Gāosù Gōnglù), officially the S12, is a controlled-access highway in Beijing, China, which links central Beijing to the Beijing Capital International Airport. It is just under 20 km in length.
Opened in 1993, the expressway links Sanyuanqiao on the northeastern 3rd Ring Road to Beijing Airport. Another expressway, the 2nd Airport Expressway, was built in 2008 prior to the Beijing Olympics to serve traffic from the city to the airport.
Airport Expressway (Beijing)