Cog railway

A cog railway or rack and pinion railway is a mountain railway with a special centre rack rail[?] mounted in the middle of the sleepers[?] between the regular rails. The trains are fitted with one or more cog wheels that mesh into this rack rail (picture (http://www.pilatus.ch/images/zahnradbahn-stangen.jpg)). This then allows the locomotives to haul the train up steeply inclined slopes.

Schneebergbahn

Mount Washington in New Hampshire, built in 1869, the only railway in the world built entirely on a trestle (3.1 miles or 5.2 km long).
Manitou and Pike's Peak Railway, Colorado Springs, Colorado, United States
Jungfrau Joch[?], on the border of the cantons of Bern and Valais, Switzerland
Schneebergbahn, Lower Austria, Austria
The Nilgiri branch of the South Indian Railway, between Mettupalayam[?] and Conoor[?] in Tamil Nadu.
Mount Pilatus near Lucerne - the world’s steepest, max. 48%.

See also: the Fell railway[?] system that uses friction wheels on a centre traction rail.