Wavetronix SmartSensor HD (101-0415) - User Guide - Manual (Page 70)

CHAPTER 7 • DATA 69
vehicle will be placed in bin 2. If a vehicle is traveling 27 mph, then that vehicle will be
placed in bin 3.
You can change the speeds by clicking on a bin and using the +/- buttons to either increase
or decrease the value.
Class
The class bins allow you to classify vehicles by ranges of lengths. If you’re not sure what
lengths to use, consult your own agency’s guidelines. If your agency has no set classification
scheme, you can look to the measurements in Table 7.2 as an example; the tables show a
scheme called Scheme F, developed by the Maine DOT.
Lengths Scheme F
0–10 1
10–19 2, 3
19–35 4, 5, 6
35–256 7-13
4 Classification Bins
Lengths Scheme F
0–10 1
10–19 2
19–24 3
24–54 4, 5, 6, 7
54–109 8, 9, 10
109–256 11, 12, 13
6 Classification Bins
Table 7.1 – Scheme F Length Classifications
Approaches
Approaches are groupings of lanes used in data collection. Using approaches allows you to
collect per vehicle–based statistics that you could not otherwise get, such as the 85th per-
centile speed for all northbound lanes, and to store these statistics onboard the sensor. Be
aware that adding approaches will increase the size of your data reports, which will affect
the number of these reports your sensor can store in its onboard memory. See the Storage
section of this chapter for more information.
Click the button in the Approaches window to group lanes together in four different
approaches (see Figure 7.4).