switchback

Already, we enter some airport bathrooms through a brief switchback of walls, so that we don’t ever grasp a door handle.

The WR faction claims that the Westbury route is better adapted to high speed, to which advocates of the SR route are apt to retort that the effect of modern diesel traction on schedules over the Salisbury-Exeter switchback has yet to be measured (the speed potential between Waterloo and Salisbury is scarcely disputable) ….