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.
Double-decker bus
In Switzerland Postauto operate double decker buses on a route between Engelburg–St Gallen–Heiden routes and in the Obertoggenburg region and in the regions of Rorschach and Goldach. 19 Alexander Dennis Enviro500 have been ordered to operate on these services, which seat 80 passengers and can carry 48 standing. Four double deckers are also operated in Graubünden which are due to be replaced within the next two years.