Methods to obtain exposure data

There is no standard method for the collection of each exposure measure. In particular, different exposure measures may be derived from one collection method. For example, a travel survey may be used to collect vehicle kilometres, but may at the same time be used to obtain the number of trips, the time spent in traffic, vehicle ownership, or driver license holder ship. Accordingly, data collected by different methods may be used to produce an exposure estimate. For instance, passenger kilometres estimates may be obtained by using vehicle kilometres derived by traffic counts and vehicle occupancy rates obtained through surveys.

The data collection methods examined are:

• Travel Surveys
• Traffic counts
• Vehicle fleet registers
• Driving licenses registers
• Road registers
• Other methods

Read more about data collection methods in the State of the art report