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Automatic equipment identification (AEI) is an electronic recognition system in use with the North American railroad industry. Consisting of passive tags mounted on each side of rolling stock and active trackside readers, AEI uses RF technology to identify railroad equipment while en route.
KarTrak, sometimes KarTrak ACI (Automatic Car Identification) or just ACI was a colored barcode system designed to automatically identify railcars and other rolling stock. KarTrak was made a requirement in North America in 1967, but technical problems led to the abandonment of the system by around 1977.
Railinc, a subsidiary of the AAR, maintains the active reporting marks for the North American rail industry. Under current practice, the first letter must match the initial letter of the railroad name. As it also acts as a Standard Carrier Alpha Code, the reporting mark cannot conflict with codes in use by other nonrail carriers. [1] [2]
Old and new railway mileposts in the UK, indicating a distance of 33 + 1 ⁄ 4 miles (53.5 km) from the zero point. The Railways Clauses Consolidation Act 1845 [8] compels UK railway companies to provide their passengers with a means of determining the distance travelled (fares were set by distance at this time). Section 94 states:
Direct traffic control (DTC) is a system for authorizing track occupancy used on some railroads instead of or in addition to signals.It is known as "direct" traffic control because the train dispatcher gives track authority directly to the train crew via radio, as opposed to through wayside personnel via telephone or telegraph, as in train orders.
PM - Pere Marquette Railway; Chesapeake and Ohio Railway; Chessie System; CSX Transportation; PMLX - Prairie Malt, Ltd. PMRX - Progress Metal Reclamation Company; PN - Piedmont and Northern Railway; Seaboard Coast Line; CSX Transportation; PN - Pennsylvania Northeastern Railroad; PNRW - Piedmont and Northern Railway (division of Patriot Rail ...
On systems where Morse code was in use it was common to assign control locations short identification codes to aid in efficient communication, although wherever signalling control locations are more numerous than mileposts, sequence numbers and codes are more likely to be employed. Entire rail systems or political areas may adopt a common ...
The token system is still regularly used on the present-day State Railway of Thailand system. Although most use occurs in regional areas, some use appears in the capital city, Bangkok, such as the Makkasan to Khlong Tan section etc. [16] Sri Lanka Railways uses a tablet exchanging system on the up-country railway line.