Lead rail

The rail is the sideline at a poker table - the (often imaginary) rail separating spectators from the field of play. Watching from the rail means watching a poker game as a ...

absolute blocking

Railways; Railroad

A control arrangement for rail traffic in which a track is divided into sections or blocks upon which a train may not enter until the preceding train has left.

gotthard base tunnel

Railways; Railroad

Currently the world's longest at 35.4-mile (57-kilometer), the Gotthard Base Tunnel through the Swiss Alps was first conceived in 1947 by engineer Eduard Gruner. The project ...

Gotthard Base Tunnel

Railways; Railroad

Currently the world's longest at 35.4-mile (57-kilometer), the Gotthard Base Tunnel through the Swiss Alps was first conceived in 1947 by engineer Eduard Gruner. The project ...

insulated switch

Railways; Railroad

A switch in which the fixtures, principally the gage plates and the switch rods connecting one rail to the other, are provided with insulation so that electric currents will not ...

turnout number

Railways; Railroad

The number corresponding to the number of frog used in a turnout.

insulating rail joint

Railways; Railroad

Sometimes called Insulated Joint. A rail joint designed to stop the flow of electric current from rail to rail, as at the end of a track circuit, by means of nonconductors so ...