The analysis of travel times between Blufax system and the GPS baseline was considered over three routes starting from locations 1, 2, and 3 (all ending at location 5). The Blufax software was limited to outputting 15-minute average route travel times. The 15-minute intervals that included a GPS start time were used to determine the absolute error in travel times. Figure 9 shows the percentage of data points equal to or less than a difference in travel time, or error, measured in seconds for route 1-5 based on a sample size of 11. The travel time averaged 108 seconds along this route. The error was less than 10 seconds only 45.5 percent of the time.