Random roadside surveys of drivers, which can give a representative picture of the entire driving population, are available for three EU Member States and Norway.
Tá suirbhéanna randamacha ar thaobh an bhóthair, ar féidir pictiúr ionadaíoch a thabhairt den daonra tiomána iomlán, ar fáil maidir le trí Bhallstát an AE agus an Iorua.