On Wed, 21 Dec 2011 18:09:55 -0000, The Natural Philosopher
wrote:

Tim Streater wrote:
In article ,
The Natural Philosopher wrote:

harry wrote:

Until one breaks down. Then the interesting inability of trains to
overtake comes into play.

--
Tim
That is where trolley buses come in.
I've never seen a trolley bus overtake another one on the same pair of
wires..

Dickhead
Is it possible in a pinch that the driver could pull down his
pantograph, drive round the stricken trolley-bus, and connect up again?

Not without a battery or auxiliary power of some other sort, no..

It strikes me that auxiliary power would be the key to making trolley
buses work well. With a good auxiliary system, it would be possible to run
wires along the roads but have breaks at junctions. And, allow run-arounds
for broken down vehicles, roadworks, etc. Far, far simpler and cheaper
than the amazing, complex systems necessary without such power.

Whether there is a viable auxiliary power system is another matter.

--
Rod