Operation of railway transportation

A railway transportation system comprises many elements, and these elements are interdependent. Without a suitable system, trains cannot operate smoothly.

First, there is the geographical environment along the railway line.

Second, what is the purpose of the system: passenger or freight? If passenger, it is necessary to consider whether passengers are commuters or medium- to long-distance travelers.

Once the needs are clarified, the type of railway to be built must be decided: light rail, heavy rail, or high-speed rail. There are also monorails, rubber-tired track systems, and maglev railways, as these lines also use track-guided trains. Many large cities now have urban rail transit or tram systems.

After deciding on the type of railway, the track gauge must be carefully selected.

Regarding train power, ancient times used horses, later steam, and then electricity, requiring electrification systems. This leads to different methods of powering trains. The most common are overhead cables and track-based power supply.

Finally, the number of tracks must be determined based on traffic volume. If the traffic volume is low, only one track can be built, but there must be a passing area to allow more than one train to use this railway. If the traffic volume is high, double or even multiple tracks can be laid. Some busy sections even have eight tracks running in parallel, with four tracks in each direction.