The categories of vehicles driven are the following: Bicycles, mopeds, motorcycles, public service cars up to 9 seats, private cars, vans, trucks weighing less than 3500 kg, agricultural tractors, trucks and articulated vehicles weighing more than 3500 kg, buses and other unspecified vehicles.
The age categories envisaged in the study are the following: 18 to 20, 21 to 24, 25 to 34, 35 to 44, 45 to 54, 55 to 64, 65 to 74, over 74 years and unknown age (UA).
data(traffic)