<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Imagine the havoc this would cause when you even park your bike though.<div><br class="webkit-block-placeholder"></div><div>-E</div><div><br><div><div>On Feb 1, 2008, at 11:48 AM, Mars wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div bgcolor="#ffffff" text="#000000"> Radio Frequency :)<br> <br> <blockquote cite="mid:cb4.29d32138.34d4a5d7@aol.com" type="cite"><font id="role_document" color="#000000" face="Arial" size="2"> <div>RF? please explain: rear fender?</div> </font></blockquote> <br> Standard GPS (as far as I know) is a read-only service, meaning a device may query a satellite for it's own location, but no data may be sent TO the satellite, and the GPS protocol will only send to your device it's own location, not a list of locations.<br> <br> For GPS to work, the satellite would need to be redesigned to not send the querying device it's own location, but a list of locations of other devices near the querying device.<br> <br> With RF, one could simply create a device similar to an <a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/RFID">http://en.wikipedia.org/wiki/RFID</a><br> <br> A vehicle could simply scan the frequency X for signal, and assuming each bicycle's transmitter would only go 100 feet or so (which would be allowed by the FCC), the car could signal an alert whenever a signal is found.<br> </div> _______________________________________________<br>Boston Critical Mass mailing list<br><a href="mailto:list@bostoncriticalmass.org">list@bostoncriticalmass.org</a><br>http://bostoncriticalmass.org/list<br>To unsubscribe email list-unsubscribe@bostoncriticalmass.org</blockquote></div><br></div></body></html>