In reply to  Jed Rothwell's message of Tue, 15 Sep 2009 10:45:43 -0400:
Hi,
[snip]
> I suppose one every few blocks in an urban 
>area might work. Sort of like cell phone towers.
[snip]
You could put them at stoplights, where people stop anyway while waiting for the
light to change.

Regards,

Robin van Spaandonk

http://rvanspaa.freehostia.com/Project.html

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