The following glossary is arranged alphabetically with each term catalogued by first letter. Select a letter below to begin.
In the hole
In a siding to meet or be passed by another train.
Industry track
Side track where freight cars can be left so a railroad customer can load or unload them.
Instruction packets
In DCC, the regular packet format used for most digital commands.
Insulated joint
A mechanical rail joint that doesnt pass electricity.
Insulated rail joiner
A plastic rail connector used to insulate joints.
Interchange
A junction of two railroads where cars are transferred from one line to the other.
Interlocking
A mechanical or electrical system of signaling which ensures that only one train at a time is allowed to move through a junction.
Intermodal
Shipments carried by more than one mode of transportation, mainly containers and piggyback trailers.
Interurban
An electrically operated light railway between cities and towns, as opposed to local streetcar service.
