In message , at 15:43:26
on Thu, 31 Jul 2008, David Cantrell remarked:
Why over-complicate it? Just have a GPS that shows routes *without* low
bridges, that are recommended for use by buses. Then you can avoid other
nasties as well.

And you think bus companies would buy that instead of buying the cheaper
consumer version?

This was a choice between two different specialist GPS designs, to fix a
specific hazard; not a choice between a specialist and a consumer
edition.

And otherwise it's not failsafe (maybe there's a low bridge somewhere
that didn't make it into the gazetteer).

That's not failsafe anyway. What if a low bridge is built over one of
your routes?

I'd be a bit surprised if you could get planning permission to build a
new bridge that's too low for a bus, over an existing street.
--
Roland Perry