Traffic Survey:

1. Where to count?
2. When to count and for how long?
   HEALTH and SAFETY issues!!!
3. What to count?
4. How to record?
5. How ‘weight’?
6. How graph?
7. How interpret?

Collecting Data Pupils will need to consider:
* where to conduct the survey;
* the most appropriate time(s) of day to survey traffic flow;
* how long to spend counting vehicles
(5 minutes may be enough on a major urban bypass, whereas anything up to 20 minutes might be more appropriate on an approach to a small town centre) ;
* into / out of town (centre)
* types of vehicle to count;
* whether some vehicles are more dangerous because of, for example, their  size, their weight, or their quantity. source: http://www.taw.org.uk/demo/geography/geographyassociation/traffic/teach.htm

Each vehicle can be given a value relating to its size and (also therefore the pollution and congestion problems it may cause). This is called a Passenger Car Unit.

1.      Use the table below to complete row 4 of Traffic Survey 2.

2.      The maximum PCU values for different types of road, which are specified by the Department of Transport, are shown below. Enter the correct number in cell B13.