This would include the ability to convert existing rail lines for dedicated light rail use, allowing connection to tram lines in the cities.  This would be a way of turning ‘no hope’ passenger rail lines into profitable light rail lines.   As we all know inter-city trams are very profitable.

The feature would also enable the construction of new light rail routes. Steeper gradients would be allowed on lines constructed for light rail, thus reducing their cost.  This would avoid the need to run trams on roads to make inter-city tram tracks.

Also another possibility would be ‘tram trains’ as pioneered in Germany.  These are able to run both on tram tracks and regular heavy rail lines.  They are always more expensive than regular trams.

This would also enable US type interurban lines.