On the motorway near Rijssen a Rijkswaterstaat incident vehicle approaches with blue beacon and two-tone siren together. Is this a priority vehicle?
Yes, both signals are present — the organisation does not matter
No, only police, fire brigade, and ambulance count as a priority vehicle
Explanation
False — trap: only-the-well-known-three. Book p.116 also names 'other emergency service vehicles and Rijkswaterstaat'; the signals determine the status, not the organisation.