Simplify the following text for a Grade 11 native English-speaking person.
Original: Edinburgh 's previous tram system , Edinburgh Corporation Tramways , shut down on 16 November 1956 and since then the only local public transport services consisted of buses and a limited network of local rail lines .
Simplified: Local public transport had been limited to buses since the closing of the cityâ s previous Edinburgh Corporation Tramways system on 16 November 1956 .