[aprssig] Traffic info in APRS

Robert Bruninga bruninga at usna.edu
Tue Apr 5 12:14:36 EDT 2005

>>> cak at dimebank.com 4/5/05 11:33:04 AM >>>
>But since I've brought the subject up ... if someone points 
>me at example code for adding objects of this type to
> APRS-IS, I'll take a shot at putting some of the speed 
>data into the system.

Actually, They are not needed in the "APRS-IS".  THey are very
local packets only desired on RF in the immediate
vicinity of the traffic slowdown for mobile users to see on
the front panel of their APRS radio.

See http://www.ew.usna.edu/~bruninga/aprs/traffic.html 

The APRSdos version APRStfc.exe is such a system.  It 
monitors all APRS mobiles in an area as "probes" and uses 
their speed past sysop defined choke points (a simple text file) 
to generate SPEED POST SIGN objects showing the 
speed of traffic past a point.  These are specifically formatted
to fit nicely on the front panel of the APRS radios.

There is also a UIview add-on, but it has features
that are (in my opinion) too easy for the not-fully-informed 
user to screwup and in some cases give worse data
than no data at all.

de Wb4APR, Bob

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