What is the difference between the following signs?

- Sign 505 indicates a stop for Public Transport (Buses). Sign 506 indicates a stop for a Public Tramway.· Correct answer
- Sign 505 indicates a stop for private buses. Sign 506 indicates a Tramway stop.
- Sign 505 indicates a Tramway Stop. Sign 506 indicates a stop for Public bus transport.
- Sign 505 indicates a public transport stop on a Motorway (Freeway). Sign 506 indicates a public bus stop on an urban road only.