1. When traveling (as a driver or a passenger) what is the vehicle most commonly used?

2. How many miles/kilometers do you travel in the most commonly used vehicle during a typical week?

3. While traveling in the most commonly used vehicle, what percentage of the time do you travel with other passengers?

4. When traveling with others in the most commonly used vehicle, how many people besides yourself are typically in the vehicle?

5. How many miles/kilometers a week do you typically ride on a train or the subway?

6. How many miles/kilometers a week do you typically ride a bus?

7. How many miles/kilometers a year do you typically travel by airplane?