Real-time traffic condition measurement using network transmission data

A computer program product embodied in a non-transitory computer readable medium that, when executing on one or more computers, performs the steps of:

• a. Identifying a plurality of cell phones that are apparently traveling in a plurality of vehicles along a roadway by:
• receiving a location of each of the plurality of cell phones from each of the plurality of cell phones, and
• comparing each respective cell phone location, from the plurality of cell phones, to a known location of the roadway to determine that each of the plurality of cell phones is proximate the roadway;
• b. identifying a speed of each of the plurality the vehicles by using a time between two respective locations of each of the plurality of the cell phones that are proximate the roadway in a speed calculation, forming a roadway traffic metric;
• and
• c. following the receipt of a map request, communicating to a requesting cell phone map traffic information based on the roadway traffic metric in a form to be presented on the cell phone.