Re: Exhibition Street Bridge and City Link

[cmgord@ecr.mu.oz.au (Christopher_Martin GORDON)]

: I wonder if this is the only problem.

: If it was, the simple solution would be to erect a second gantry (or
: even just a transmission tower) say 100 meters down the road from the
: first one: it would be much simpler as it doesn't have to video each
: car, just transmit a signal back to the e-Tag.  100 meters is about
: 3.5 sec at 100km/h (100x1000/60/60 = 27.7m/sec), more than enough time
: if I use your figures of 2-3 seconds.  

: Even if each extra gantry cost $1 million, you'd have to think it
: worth it to them to construct them so that they can start collecting
: tolls and avoid the huge cash flow drain they must be experiencing.

Some of the orginal plans were to have two gantries, but the problem of
people changing lanes then needs addressing.

Another plan was to have two gantries on each entry and exit ramp, where
the speed would be less than 100 km/h, there is no problem of changing 
lanes.  The with one at entry and exit you know where the person got one
and got off and toll the right level.  (But you would need ones at the ends
of the tollway.  There are 4 ends)

:        
: Regards

: Yuri
: -- 
: ==================================
: Yuri J Sos
: Melbourne VIC AUS

: Reply to: steam4me@enternet.com.au

: Web site is located at
: http://www.railpage.org.au/steam4me
: ==================================

--

Chris Gordon
http://www.ecr.mu.oz.au/~cmgord

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