Choosing A Mounting Height And Offset - Wavetronix Expanse XP20 User Manual

Choosing a mounting height and offset

Offset
* reduction
in number
of reported
speeds.
50–230
Mounting guidelines in feet
Height (acceptable range)
6* 12
7* 12
8* 12
9 12
10 12
11 12
12 13
13 13
14 14
15 15
16 15
17 16
18 17
19 17
20 18
21 19
22 20
23 22
24 24
25 26
26 26
27 27
28 27
29 27
30 29
31 29
32 29
33 30
34 30
35 30
36 30
37 31
38 31
39 33
40 33
41 34
42 34
43 35
44 35
45 36
46 36
47 36
48 38
49 38
39
(9–19)
(9–19)
(9–20)
(9–21)
(9–22)
(9–23)
(10–24)
(11–25)
(11–28)
(12–26)
(12–27)
(13–28)
(14–29)
(14–30)
(15–30)
(15–31)
(16–31)
(16–32)
(16–33)
(17–33)
(17–34)
(18–35)
(18–35)
(18–36)
(19–37)
(19–37)
(19–38)
(19–39)
(19–39)
(20–40)
(20–41)
(20–41)
(21–42)
(21–43)
(22–43)
(22–44)
(22–44)
(22–45)
(23–46)
(23–46)
(23–47)
(24–48)
(24–48)
(24–49)
(25 to <offset)
Chapter 1: Choosing a mounting location
Note. Mounting
height is measured
from the road's
height, not the
bottom of the pole. If
installing a new pole,
remember that part
of the pole will likely
be below ground.
Definition. Offset is
the distance between
the pole the sensor
is mounted on and
the edge of the first
lane to be detected.
7
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