Railroad track

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A pair of parallel rails laid end to end and on which trains run.

SWITCH 1

manually operated switch

Device operated by hand for opening and closing a pair of movable track rails (switch points) to guide a train from one track to another.

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switch point

Movable rail that is machine-tapered at the end and connected to a parallel and similarly machined switch point.

slide chair

Type of seat on which the switch points slide.

pull rod

Metal part connected to the switch stand that opens and closes the switch points.

switch stand

Manually operated lever that opens and closes the switch.

check-rail

Metal part opposite the frog and inside the running rail that keeps the train on the tracks as the wheels pass over the frog.

switch signal

Device with an arm that is controlled by the switch stand; it is raised or lowered to indicate whether the switch is open or closed.

frog

Casting that makes it possible for wheels to roll smoothly over the point where two rails cross.

closure rail

Two fixed rails located between a switch point and a frog

SWITCH 2

remote-controlled switch

Device operated from a distance for opening and closing a pair of movable track rails (switch points) to guide a train from one track to another.

switch point

Movable rail that is machine-tapered at the end and connected to a parallel and similarly machined switch point.

closure rail

Two fixed rails located between a switch point and a frog.

point wire

Wire that connects the power switch machine to levers in the switch house.

power switch machine

Remote-controlled motor that provides the mechanical force for opening and closing the switch.

switch rod

Metal part located between two ties that maintains the distance between two switch points.

pull rod

Metal part connected to the power switch machine that opens and closes the switch points.

TRACK

railroad track

A pair of parallel rails laid end to end and on which trains run.

ballast

Bed of gravel that serves as the foundation for the tracks and provides drainage.

rail

Steel bar of a set gauge that is attached to ties; the train’s wheels roll along it.

rail section

tie

Piece of wood or concrete that is set in ballast and supports the rails to distribute the train’s load and keep the rails parallel.

RAIL SECTION

rail section

base

Lower horizontal part of the rail; it rests on and is attached to the ties.

web

Narrow vertical part of the rail to which the fishplates are attached.

head

Upper horizontal part of the rail on which the wheels roll.

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