The GPS-based Odograph Prototype (GOP or GPS Odograph) was developed in an effort sponsored by The Federal Highway Administration (FHWA). The purpose of this effort was to develop a means of using inexpensive commercial off-the-self laptop (or notebook) computers and Global Positioning System (GPS) receivers to automate the collection of
roadway speed and travel time data. This document, The GPS Odograph Users Guide was written to provide instructions on how to use the GPS Odograph.
This report describes a set of CMS monitoring procedures, collectively called Travel Time with GPS (TTG), which can be implemented on low cost, common...
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United States Department of Transportation
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