What’s a Line Box? Or, What is in the large and heavy box that is seen carried into a locomotive on each trip?

17-07-2019

A Line Box is a box or trunk that is taken on board the locomotive for every trip. It contains the working timetable, and essential equipment such as detonators and flares, perhaps the driver's log and a few personal items should he wish to keep them there. (Most drivers have a separate bag with a change of clothes and other personal items.) It may also hold drawings of the pneumatic and electrical systems and other basic essentials that the driver might need to troubleshoot the loco in case any problems arise. The box also used to contain a couple of spare lamps for the headlights, although this is no longer neccesary with the twin beam sealed headlamps. The box follows the locomotive

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Why do trains sometimes slow down on some sections instead of continuing at the same speed throughout?
July 17, 2019

There are many reasons for a reduction in speed. There may be permanent speed restrictions on the section of track: because of sharp curves or curves with inadequate cant; approaches to crossovers, diamonds, etc.; structures too close to the track; ghat sections; lineside tenements or pedestrian traffic; level crossings; old bridges or culverts;

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What other considerations go into the determination of a loco link?
July 17, 2019

Apart from the considerations above, periodic trip inspection schedules form a consideration for determining loco links. Normally, locos must be inspected at a trip shed every 2500km or on completion of a single trip, whichever is earlier. In addition, every 30 to 35 days, locos are withdrawn from service for IA, IB, or IC scheduled

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What determines where locomotives are changed for a train?
July 17, 2019

Locomotive changes often happen at convenient points where there is an appropriate loco shed where locos can be housed for a while and given some routine maintenance if necessary, etc. Except for long express services (for which keeping down the number of halts is a priority) hauled by WDM-2, WAM-4, WAP-4, WAP-5, and other such locos for which

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What does it mean when a passenger or freight rake is referred to as a ’15/30′ load, or a ’36 unit’ load?
July 17, 2019

In order to compute the load to be hauled by the locomotive(s), IR personnel use some rules of thumb. An 8-wheeled passenger coach (of any kind) is counted as 2 units, a 4-wheeled wagon as 1 unit, 8-wheeled wagons as 2, 2.5, or 3 units depending on the payload capacity. A 36 unit load for a passenger train, therefore, may refer to 18 coaches each

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What else is specified in the working timetable?
July 17, 2019

The working timetable has a lot of other operational details. It has the load table specifying what loads each kind of locomotive is allowed to haul on sections covered by the timetable. In addition to the schedules for trains including the make-up time, etc., as noted above, it sometimes has a crossing and precedence table that describes which

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How is that trains that are delayed unexpectedly at some point (sometimes) still reach their destinations on time or nearly so?
July 17, 2019

IR provides generous amounts of make-up time or slack (also known as Extra Time Allowed (marked 'EA' in the working timetable), or margin) in the schedules for most long-distance trains. Delays of half-an-hour to a couple of hours are almost inevitable in the running of most long-distance trains (except the 'prestigious' ones such as the

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