5. PROGRAM EVALUATION (continued)22.214.171.124 Phoenix – Coral Gables Drive North/South Segment
The north/south portion of Coral Gables Drive is wide and lined with expensive single family homes. This segment received enforcement and education as well as a Tyregrip™ installation between Waves 4 and 5. Only three waves of data (Waves 1, 4, and 5) were collected. The speed results for this segment are presented in Table 69 and Figure 17.
Table 69. Phoenix – Coral Gables Drive North/South Segment Speed Results
In addition to the significant drop in mean speed in each successive wave, there was a notable reduction in the number of vehicles traveling 7+ miles over the limit. This drop of over 4,000 cars is far in excess of the overall reduction in vehicles counted of only 518 between Wave 1 and Wave 5. Thus, diversion cannot possibly explain the observed results. Also, the marked effect of the addition of the Tyregrip™ material on mean and excessive speeds is noteworthy.
Figure 17. Speed Classes on Phoenix – Coral Gables North/South Segment