ITS Research Program, UW
Please note: This is NOT www.traffnet.net.
If you are looking for information concerning credit card charges for 'trafnet.net' or 'traffnet.net', you are not in the right place. We have no connection with any such credit card billings.
TrafNet displays real-time, Seattle area traffic conditions on your Windows-based PC. Unlike a Web site, TrafNet stores all graphics on your computer and only uses the Internet to obtain small data files. This means your display updates extremely quickly, even if you're connected over a phone line with a slow modem. TrafNet also displays current traffic speed, records traffic information for future playback, and computes travel times based on current traffic conditions.
Downloading TrafNet:You may download TrafNet via the following mechanisms:
Operating TrafNet:Run TrafNet as you would any other Windows program. On-screen help is available.
Here is a sample screen. (This image is not updated.)
TrafNet is a client which acquires data from a server via a TCP connection
over the Internet; the display is updated with new information every 20 seconds. Since only traffic information is transferred (the client handles all the graphics), updates are quick, with very little overhead.
If your WinSock implementation does not have a working name server, use the address 22.214.171.124, but be aware that this is subject to change. The alias trafnet.its.washington.edu will be changed in the name server if the server is moved to a different host so that it will always resolve correctly.
loop_client is a Unix program which provides occupancy, speed and volume data for individual loop sensors embedded in Seattle area freeways.
A Kalman Filter, which can be incorporated into existing C code, is available to produce speed estimates from single loop data
To get a snapshot of current traffic conditions over the WWW, check out the Washington State Department of Transportation Metro Traffic Flow Map.
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(October 5, 1999)