5. PROGRAM EVALUATION (continued)5.1.4 Time of Stop
Table 8 shows the times that the special enforcement speeding stops were made in both Peoria and Phoenix . The table shows that all Peoria stops were made in two time periods: 6 a.m. to 8:59 a.m. (40.8%) and 2 p.m. to 6:59 p.m. (59.2%). These times appear to be selected to cover rush hour traffic, and therefore the drivers are likely typical of those who speed during rush hours in the three neighborhoods.
In contrast, the Phoenix police spread their special enforcement activities throughout the day (omitting the “graveyard shift” 11 p.m. to 5:59 a.m. time period). The majority of their stops (55.5%) were made in the 2 p.m. to 6:59 p.m. time period. However, they also stopped 14.6 percent of their speeders in the morning rush hour (6 a.m. to 8:59 p.m.) and 25.7 percent of their speeders in the period from 9 a.m. to 1:59 p.m. A few stops were also made after 7 p.m.
Table 9 shows the stops made by Peoria police broken down by time and the three neighborhoods under study. It shows that afternoon stops were made more often in the 95th Avenue neighborhood (71.5%) and the Bell Park neighborhood (56.4%). Morning stops were made more frequently in the Desert Harbor neighborhood (55.7%).
Similar data for Phoenix are shown in Table 10. That table shows that most stops (71.1%) were made after the noon hour. This was true for all Phoenix neighborhoods, particularly the Clarendon neighborhood where 89.1 percent of the stops were made after the noon hour and Moon Valley/Coral Gables where 79.9 percent of the stops were made after the noon hour.