Re: MORE TRAMWAY TRIVIA

[John Duncan McCallum <mccallum@melbpc.org.au>]

Ron BEST wrote:

> JI did mean to exclude crossings in Sydney and Melbourne between trams and
> underground railways, or between trams and underground roads, as in
> Melbourne with City Link. Sydney's light rail line poses some interesting
> dubious cases, however, and raises the hoary old question - when is a bridge
> not a bridge, but a tunnel?? Anyone want to start a thread on this one?
> Rgds
> Ron BEST
>

An interesting question. Technically, I would say that a tunnel is bored, but a
bridge is built.
Using this definition, parts of the Melbourne City Loop and the New York subways
would be
bridges, even though they (the New York ones) are many kilometres long!

John McCallum