Trolley-bus trips

John Carson was lucky to find details on tram revenue projections (Letters, 21 June).

I have formally asked the trams operator twice if trolley-buses were considered and have still not received a reply.

If they had been used instead of trams, they would have been running three years ago, along the original route for a fraction of the cost and without any track needed.

Look at Limoges: perfect modern public transport with no fumes and silent running.

Bruce Whitehead

Edinburgh