Article 2
Percentage standard error 1. Where the methods used by Member States in compiling the data involve sample methodology, the percentage standard error (95 % confidence) of the annual estimates for tonnes transported, tonne-kilometres performed and total kilometres travelled loaded for total goods road transport and for national goods road transport shall not be greater than ± 5 %. 2. Where the total stock of goods road motor vehicles relevant to the survey in a Member State is less than 25000 vehicles, or the total stock of vehicles engaged in international transport is less than 3000 vehicles, the percentage standard error (95 % confidence) of the annual estimates for tonnes transported, tonne-kilometres performed and total kilometres travelled loaded for total goods road transport and for national goods road transport shall not be greater than ± 7 %.