In message , at 15:06:26
on Wed, 29 Jun 2011, David Cantrell remarked:

Tolls are rarely charged on routes you *have* to use, there's normally a
"long way round". Which doesn't exist for the US Embassy, being inside
the zone. So it's a lot more like car tax, than say the Dartford Toll.

That's OK, there are exceptions to the "there's another way round"
argument, such as the Skye bridge, before it was nationalised.

That's one of the exceptions I had in mind when I typed 'normally'.

Although there was a "long way round" using ferries (eg from Mallaig).
I'm not sure ferries count as toll roads.
--
Roland Perry