The low line route of the B&O was still used for passenger traffic and did so many years after the construction.

The single line route runs along the beach and harbourfront to the historic lighthouse on the hill.

Also, standards of service on many main line routes were improved considerably, particularly the inter-urban routes.

On 31 August 2009 a few permanent changes to the line routes were applied.

This segment is the busiest single line route in the world.

It's more of a straight line route rather than being sort of corner to corner.

The main line route was shaped like an "L".

Fast Passenger trains generally run on long distance single line routes.

A commonly used main line route is as follows.

Currently there are no 30 or 70 line routes.