Consider the types of poor driving habits that might occur at traffic light.

Assignment 2.1: Quality management tools

Due date: week 6 (during tute)

Question : Consider the types of poor driving habits that might occur at traffic light. Make a list of the 7 poor driving habits (perhaps : running late, speeding, no turn signal, truing from wrong lane tec.) you consider most likely to happen, and the category of ‘other’ to that list.
a. Compose a check sheet to collect the frequency of occurrence of these habits. Using your check sheet, visit a busy traffic light intersection at four different times of the day, with two of these times being during high-traffic periods (rush hour, lunch hour). For 15 to 20 minutes each visit, observe the frequency with which the habits you listed occurred.
b. Construct a Pareto chart showing the relative frequency of occurrence of each other.

 Running light
 Speeding
 No turn signal
 Failure to yield on left turn
 No stop when turning right on red light
 Blocking intersection on red
 Honking horn when light turns green
 Not observing light when it turns green
 Turning from wrong lane
 Appear to go through light but stop suddenly
 Other
Check sheet might look like the following:

Location: 2nd Time of Day
and Forrester
Poor DrivingHabit 7:00–7:20 A.M. 10:00–10:20 A.M. 5:00–5:20 P.M. 7:30–7:50 P.M. Total
Running light     14
Speeding    13
No turn signal     8
Failure to yield on     8
left turn
No stop when    8
turning right on red
light
Blocking   10
intersection on red
Honking horn     12
when light turns
green
Not observing light     6
when it turns green
Turning from   2
wrong lane
Appear to go    4
through light but
stop suddenly
Other     11

The frequency counts for this set of observations is shown on the right. The check sheet can be used to discuss the differences in driving habits at different times of the day.
(b) The check sheet results can be sorted into a descending frequency table.
Sorted Frequency Table
Poor Driving Habit Frequency
Running light 14
Speeding 13
Honking horn when light turns green 12
Other 11
Blocking intersection on red 10
Failure to yield on left turn 8
No stop when turning right on red light 8
No turn signal 8
Not observing light when it turns green 6
Appear to go through light but stop suddenly 4
Turning from wrong lane 2

A Pareto chart like the one shown below can illustrate the major habits that dominate the behavior. Note: A classic
Pareto chart would also include a cumulative probability line.

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