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.
Bilevel rail car
In 1964, Tulloch Limited built the first double-decker trailer cars for use in Sydney. They ran with single deck electric motor cars. After the success of the trailers, Tulloch built four experiment double decker power cars in 1968. These were the first fully double deck Electric Multiple Unit passenger trains in the world.