Theory Mastery

Emergency vehicle: blue light and two-tone horn

A vehicle only counts as an emergency vehicle with priority when it uses both signals at the same time: a blue rotating, flashing or blinking light and the two-tone horn. Light alone or horn alone does not make it one; the ordinary priority rules then apply.

Source: RVV 1990 art. 1 · checked 2026-10-23

How the exam asks it

You are driving on a priority road in Utrecht. From a side street on the right an ambulance approaches with blue flashing lights and its two-tone horn on. It wants to enter your road. What do you do?

  1. You let it go first; slowing down is enough if it can carry on freely
  2. You drive on, because on the priority road it has to wait for you
  3. You let it go first, and that is only possible by stopping completely
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Correct answer: You let it go first; slowing down is enough if it can carry on freely

False — the priority road gives you no priority here. You always let a vehicle with blue flashing lights and a two-tone horn go first; that duty overrides the ordinary priority rules and signs. (VekaBest H1 begrippenkader (wettelijke basis, RVV art. 1/29/50) — THIN ATOM, geen VekaBest-hoofdstuk 6-herhaling; zie h03_voorrang voor het boekmateriaal p.102-116)

Why learners get this wrong: The duty to give way to a priority vehicle only applies when the ordinary priority rules would happen to give the same result anyway.

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In Utrecht you approach a junction without signs or road markings. From the left comes a fire engine with blue flashing lights and a two-tone horn. Because you come from its right, you may cross the junction first.

  1. True
  2. False
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Correct answer: False

False — you let the ordinary priority rule decide here. You let a vehicle with blue flashing lights and a two-tone horn go first, even if under the ordinary rules you would have priority because you come from the right. (VekaBest H1 begrippenkader (wettelijke basis, RVV art. 1/29/50) — THIN ATOM, geen VekaBest-hoofdstuk 6-herhaling; zie h03_voorrang voor het boekmateriaal p.102-116)

Why learners get this wrong: The duty to give way to a priority vehicle only applies when the ordinary priority rules would happen to give the same result anyway.

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In Deventer you are driving towards a junction without signs. From the left an ambulance approaches with a blue flashing light and a two-tone horn. To your right there is room to move aside. What must you do to give priority?

  1. Simply drive on: you come from the right, so the ambulance has to let you go
  2. Come to a complete standstill no matter what; only slowing down does not count as giving priority
  3. Make sure the ambulance can pass unhindered; slowing down and moving aside can be enough
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Correct answer: Make sure the ambulance can pass unhindered; slowing down and moving aside can be enough

False — you apply the ordinary rule of traffic from the right. You let a vehicle with a blue flashing light and a two-tone horn go first, even if under the ordinary priority rules you would have priority yourself. (VekaBest H1 begrippenkader (wettelijke basis, RVV art. 1/29/50) — THIN ATOM, geen VekaBest-hoofdstuk 6-herhaling; zie h03_voorrang voor het boekmateriaal p.102-116)

Why learners get this wrong: The duty to give way to a priority vehicle only applies when the ordinary priority rules would happen to give the same result anyway.

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Giving priority is 'enabling the drivers concerned to continue their journey unimpeded'.

  1. False
  2. True
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Correct answer: True

Giving priority is 'enabling the drivers concerned to continue their journey unimpeded'. That can also mean slowing down or waiting, without coming to a full stop

Why learners get this wrong: Giving priority always means you must come to a complete stop.

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Near the hospital in Nijmegen an ambulance drives down the street with only the blue flashing light on (no horn audible). Is this legally a priority vehicle?

  1. No — the law requires light and horn together
  2. Yes — the blue light alone is already sufficient signal
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Correct answer: No — the law requires light and horn together

The law names light AND two-tone horn together; without the horn the status is not met.

Why learners get this wrong: 'Voorrangsvoertuig' is another word for a priority sign beside the road.

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