Comparison of offside rear of Plaxton Paramount coaches, showing (left) the "Continental Door" which allows safe and convenient boarding and alighting in a foreign country having the opposite "rule of the road" from the vehicle's home country; and (right) standard emergency exit door at saloon floor level.
<a href="//commons.wikimedia.org/wiki/User:Quackdave" title="User:Quackdave">Dave Root</a>
<span class="int-own-work" lang="en">Own work</span>