Freeway Management and Operations Handbook

Description of Figure 15-14: Projected Growth in Freeway Surveillance

This graph shows the percentage of urban freeway miles instrumented on the vertical axis, ranging from 0% to more than 50%. The year is shown on the horizontal axis, ranging from 1990 to 2010. A single straight line is plotted for the actual percentage of instruments installed until 1999, showing 6% in 1990, 16% in 1997, and 22% in 1999. The line forks after 1999, with the upper line plotting the optimistic projection of 55% instrumentation in 2010 and the lower line plotting the pessimistic projection of 44% in 2010.

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Freeway Management and Operations Handbook
Back to Chapter 15 Page 3 Description of Figure 15-14: Projected Growth in Freeway Surveillance This graph shows the percentage of urban freeway miles instrumented on the vertical axis, ranging from 0% to more than 50%. The year is shown on the horizontal axis, ranging from 1990 to 2010. A single straight line is plotted for the actual percentage of instruments installed until 1999, showing 6% in 1990, 16% in 1997, and 22% in 1999. The line forks after 1999, with the upper line plotting the optimistic projection of 55% instrumentation in 2010 and the lower line plotting the pessimistic projection of 44% in 2010.
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