Double-decker bus
The first commercial horse-drawn double-decker omnibuses were introduced in England in 1847 by Adams & Co. of Fairfield, Bow, then improved upon by John Greenwood, who introduced a new double-decker in 1852.
Beijing Bus
On July 1, 2016, the first double-decker electric buses entered service in Beijing on Route 观光3, a tourist route that runs from the Summer Palace to the north gate of the Forbidden City. In February 2017, the first double-decker electric buses for a standard route were introduced to Bus 44. The electric double-decker bus has 70 seats and can carry 100 passengers. By March 2017, the electric double decker fleet had expanded to 10 bus routes: 13, 44, 55, 121, 425, 510, 569, 专6, 专8 and 特12. Later that same year, route 10 also started running Yinlong double-decker EVs. In January 2018, Huairou bus H64 was converted to double-decker electric buses.