It may interest people to know that there was no need for overhead power cables in Princes Street.
A brand new tram system using Alstom trams was recently built in the French city of Nice.
Most of the lines are powered by the normal overhead method but the clever thing is how the trams cross the picturesque old part.
Powerful batteries in the Alstom trams can cover the distance. They are recharged when running under power lines.
Henry Ross Place