Measuring traffic discipline

15-Mar-2014.

We will use the following processes to measure discipline for the following 3 violations:

  1. Not following the stop line at signals,
  2. Taking left on red signal,
  3. Talking on mobile phone while driving

Please click on the respective link to go to the process.

 


 

1. Not following the stop line at signals:

Preconditions:

Working amber and red signal, clear zebra and stop line.  If the stop line is not clear, treat the zebra itself as a stop line.

Observe:

Vehicles that arrive at the intersection after the signal becomes amber and then red.  Ignore vehicles that sneak through the signal as it turns red.  Focus only on vehicles that stop in the first row.  These vehicles would generally have enough time to stop at the red and they had a choice of stopping before or after the stop line.  Ignore vehicles in the second row.

Count:

A = No of vehicles that clearly stop before the stop line AND stay there till the signal becomes green again.  Include vehicles that may have turned the left blinker on, indicating that they want to turn left (no need to count these separately).
B = No of vehicles that violate the stop line, either when they stop or when the signal is about to become green again.  Ignore vehicles turning left.

Count A and B for at least 30 minutes, preferably 60 minutes.  Count them for complete signal cycles.

Report:

A, B, Time in minutes.
Date, time, signal (chowk), road and direction.
Whether a police staff was present. 

Use this form to submit your readings.


 

2. Taking left on red signal

Preconditions:

Working green or amber left turn arrow, amber and red signal.  The signal that allows a left turn should be clearly and naturally visible to people in the left turn lane.

Observe:

Vehicles that arrive at the intersection after the signal becomes amber and then red.  Ignore vehicles that sneak through the signal as it turns red.  Focus only on vehicles that arrive at the signal clearly after the signal becomes red (= vehicles that could have safely stopped at the signal.)

Count:

B = No of vehicles that violate the red signal and take a left turn.

Count B for at least 30 minutes, preferably 60 minutes.  Count them for complete signal cycles.

Report:

A, B, Time in minutes.
Date, time, signal (chowk), road and direction.
Whether a police staff was present.

Use this form to submit your readings.


 

3. Talking on mobile phone while driving

Preconditions:

No specific preconditions.

Observe:

The observation point should be sufficiently away from a traffic signal.  Prefer a straight road.  Choose a location that is at least about 200m (2 minute walk) away from any chowk, whether with a signal or not.

Observe only two-wheelers and in only one direction - going towards left.

Count:

The observation is split in two stages:

1) Count 2-wh riders using the mobile while riding.  Ignore hands-free users.  Count only those who are holding the phone between their ear and shoulder, or to the ear with one hand.  Do this counting for 30 minutes.  This is called A.
2) Take a video shooting of the same road for 15 minutes after #1 above.  Go home, play the video on your computer and count the total no of two-wheelers captured in the video.  This is called B.

Report:

A, B.
Date and time.
Road and direction of flow measured.

Use this form to submit your readings.