# What is double line in railway?

## What is double line in railway?

A double-track railway usually involves running one track in each direction, compared to a single-track railway where trains in both directions share the same track.

## How wide is a double-track railway?

The width between the rails is 4 feet 8.5 inches. It is derived from the carts being dragged by pit ponies 150 years ago. However, bridge abutments, tunnels and viaducts on double track railways offer a clear width seldom less than 7.3m (24 feet) – the same as the carriageway width required for a two-way trunk road.

Which train is fastest single track or double-track?

More than 50% of 79 mph passenger trains on double track have faster run times than the 110 mph passenger trains in the single-track configurations (Z).

### What is the distance between two tracks?

The gauge of the railway track is a clear minimum vertical distance between the inner sides of two tracks is called a railway gauge. That is, the distance between the two tracks on any railway route is known as a railway gauge. Approximately sixty percent of the world’s railway uses a standard gauge of 1,435 mm.

### Can you stand between two trains?

Passing trains have very little clearance between them. Unless you are very thin, the line has higher than normal clearance (for example high speed line, or designed for trains wider than the ones passing), the chances are there will not be enough space to physically fit between the two trains.

Why railway tracks have gaps?

The gaps left between successive rails on a railway track, the reason is that the rails expand in summer. The gap is provided to allow for this expansion. If no gap is left, the expansion in summer will cause the rails to bend sideways. That will result in train accidents.

#### Why are most railways in the UK double track?

In the earliest days of railways in the United Kingdom, most lines were built as double-track because of the difficulty of co-ordinating operations before the invention of the telegraph. The lines also tended to be busy enough to be beyond the capacity of a single track.

What makes a double-track line more cost effective?

The distance between the track centres makes a difference in cost and performance of a double-track line. The track centres can be as narrow and as cheap as possible, but maintenance must be done on the side.

## What is an example of a single track railway line?

An example is the Strathfield to Hamilton line in New South Wales, which was constructed as mainly single-track in the 1880s, with full duplication completed around 1910. All bridges, tunnels, stations, and earthworks were built for double track. Stations with platforms with 11′ centres had to be widened later to 12′ centres, except for Gosford .

## What is the difference between a single track tunnel and double track?

A double-track tunnel with restricted clearances is sometimes singled to form a single track tunnel with more generous clearances, such as the Connaught Tunnel in Canada or the Tickhole Tunnel in New South Wales, Australia.