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 8. Time of Stop ( Peoria and Phoenix )

Time of Stop
City

Phoenix

Peoria

Total

6 a.m. to
8:59 am

Count

113

115

228

Row %

49.6%

50.4%

100%

Column %

14.6%

40.8%

21.6%

9 a.m. to
1:59 pm

Count

199

0

199

Row %

100%

0%

100%

Column %

25.7%

0%

18.9%

2 p.m. to
6:59 pm

Count

429

167

596

Row %

72%

28%

100%

Column %

55.5%

59.2%

56.5%

7 p.m. to
10:59 p.m.

Count

32

0

32

Row %

100%

0%

100%

Column %

4.1%

0%

3%

 

Total

Count

773

282

1055

Row %

73.3%

26.7%

100%

Column %

100%

100%

100%

 

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%).

Table 9. Neighborhood by a.m. or p.m. Stop ( Peoria )

Stop Time
Neighborhood

95th Avenue

Desert Harbor/91st Avenue

Bell Park/84th Avenue

Total

a.m.

Count

37

54

24

115

Row %

32.2%

47%

20.9%

100%

Column %

28.5%

55.7%

43.6%

40.8%

p.m.

Count

93

43

31

167

Row %

55.7%

25.7%

18.6%

100%

Column %

71.5%

44.3%

56.4%

59.2%

Total

Count

130

97

55

282

Row %

46.1%

34.4%

19.5%

100%

Column %

100%

100%

100%

100%

 

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.

Table 10. Neighborhood by a.m. or p.m. Stop ( Phoenix )

Stop Time
Neighborhood

Sweetwater

Moon Valley/Coral Gables

Clarendon

Total

a.m.

Count

136

81

6

223

Row %

61%

36.3%

2.7%

100%

Column %

43.3%

20.1%

10.9%

28.9%

p.m.

Count

178

322

49

549

Row %

32.4%

58.7%

8.9%

100%

Column %

56.7%

79.9%

89.1%

71.1%

Total

Count

314

403

55

772

Row %

40.7%

52.2%

7.1%

100%

Column %

100%

100%

100%

100%