Stiffer penalty for human being over the...
Answers: The wires are all part of the pack of the same grid. The bus simply rides the bottom of doesn`t matter what wire or T-junction it's crossing. A short break in the contact is covered by onboard battery.
"Trams draw their power from a single overhead wire at roughly 500 to 750 V above earth, while trolleybuses draw their power from two overhead wires (powered at similar voltage). Because of that, at lowest possible one of the trolleybus wires must be insulated from tram wires. This is usually solved in the following instrument: the trolleybus wires run continuously through the crossing. The tram conductors are slung a few centimetres lower than the trolleybus wires. Close to the junction on respectively side, the wire merges into a solid railing which is angled to run parallel to the trolleybus wires for about partially a metre. Another bar similarly angled at its ends is hung between the trolleybus wires. This is electrically connected above to the tram wire's catenary cable. The tram's pantograph bridges the distance between the different conductors, providing it with a continuous pickup.
Where the tram flex crosses, the trolleybus wires are protected by an inverted trough of insulating material extending 20 or 30 mm below the smooth of the trolleybus wires. The tram pantograph or bow collector raises the conductor rope a little as it pass under. These troughs are presumably to restrain how far it can do that and to provide a backstop to prevent the tram pantograph or bow collector ever touching the trolleybus wires.
Several cities use the above system. Until 1946 there be a level crossing surrounded by Stockholm, Sweden between the railway south of Stockholm Central Station and a tramway line. The tramway operate on 600-700 V DC and the railway operated on 15 kV AC. Some crossings between tramway/light banister and railways are still alive in Germany. In Zürich, Switzerland the VBZ trolleybus smudge 32 has a smooth crossing with the 1200V DC railway to mount Uetliberg; at frequent places in the town trolleybus lines cross the tramway. In the Swiss settlement Suhr the tramway WSB operating at 1200V DC crosses the SBB line on 15 kV AC. In some cities, trolleybuses and trams hold shared the same positive (feed) telecommunication. In such cases a normal trolleybus frog can be used.
Another system that have been used is to coincide piece breaks with the crossing point so that the crossing is electrically limp."
I got this except from the wikipedia website. There's more nearly the historical aspect of it and how it differs from other foreign countries.
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