How does SeaTraffic work?
The Washington State Department of Transportation (WSDOT) gathers traffic data from sensors (loops) under selected roadways. This makes it possible to calculate the average speed of traffic and this information is sent to WSDOT computers. The WSDOT makes this data available to the public via the internet in a compressed file. SeaTraffic retrieves this file directly from the WSDOT servers, in the same manner that a web browser retrieves files. SeaTraffic then interprets and formats this data to create the maps on your handheld. Additional information about the traffic data is available at the Washington State Department of Transportation.