Transport of goods by road

The source of information is from a sample of road goods vehicles drawn from the stock of vehicle registered in the Danish digital motor vehicle register. A stratified sample is drawn from all lorries and road tractors with maximum permissible laden weight above 6 tonnes. About 2,000 vehicles is selected each quarter. The sample is around 4.5 percent of the stock of relevant road goods vehicles (lorries and trucks). For each vehicle the data provider must report transport during a single week (Sunday to Saturday). The true sample size is thus 0.35 percent of possible vehicle weeks.

The vehicles are divided into 35 groups according to type of transport, type of vehicle (lorries and trucks), total laden weight, available hitch and average annual kilometers driven. The sample is distributed between the groups to optimize the sample size given the requirements of statistical precision on transport performance measures.

The stratification is determined by the following characteristics (note that not all combinations exist and therefore there are only 35 and not 42 strata):

First digit

1 = 'Solo lorries (mostly)'

2 = 'Lorries with hook, 15-18 ton'

3 = 'Lorries with hook, 18-24 ton'

4 = 'Lorries with hook, 24 ton +'

5 = 'Road tractors, -18 ton'

6 = 'Road tractors, 18-24 ton'

7 = 'Road tractors, 24 ton +'

Second digit

1 = 'For hire or reward'

2 = 'Own account'

• Third digit *

1 = "Driven less than median for segment"

2 = "Driven more than median for segment"

3 = "New car (no road worthiness tests)"

The selected vehicles are then distributed evenly over the weeks of the quarter.

Data are collected through web forms via the common public data collection platform, Virk and a mobile app (vejgodsstatistikken) available on iOS and Android platforms.