Theory Mastery

Reflectie rood achter wit voor oranje zijkant

Always: 2 red rear lights, 2 red brake lights, 2 indicators, plate lighting and 1 red rear fog light. Reflection: red rear (triangular), white front, orange on each side. Conditional: position lights only >1.60 m wide, reversing light only >750 kg, marker lights only >6 m long or >2.10 m wide

Source: Load and trailer · checked 2026-10-23

How the exam asks it

On a foggy morning along the N33 you check the lighting of your narrow trailer (1.30 m wide, 500 kg). Which items are ALWAYS required, regardless of width or weight? (select all that apply)

  1. 2 red rear lights
  2. 1 red rear fog light
  3. Plate lighting
  4. 2 white front position lights
  5. A reversing light
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Correct answer: 2 red rear lights; 1 red rear fog light; Plate lighting

Why learners get this wrong: Every trailer must have position lights at the front.

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In a car park near Arnhem you are sticking new reflectors on your trailer: two red triangles, two white ones and a set of orange ones. You pick up the two white ones.

  1. White goes at the back, next to the red triangles
  2. White goes at the back, the red triangles at the front
  3. White goes at the front, the red triangles at the back
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Correct answer: White goes at the front, the red triangles at the back

False — You put the red triangles at the front. The red triangular reflectors belong at the back and the white ones at the front, just like rear light and headlight.

Why learners get this wrong: The white retroreflectors of a trailer belong at the rear.

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Statement: a trailer only needs a rear fog light if it was put into service after 31 December 1997.

  1. True
  2. False
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Correct answer: False

Why learners get this wrong: A trailer only needs a fog light if it was put into service after 31 December 1997.

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It is getting dark on the Groningen ring road. Your car lights are on, but your trailer's lighting is on a separate switch and is still off. The trailer's reflectors are clean.

  1. Have it wired so the trailer lights up together with the car
  2. Switch it on whenever you yourself think it is needed
  3. Drive on like this, the clean reflectors make you visible
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Correct answer: Have it wired so the trailer lights up together with the car

False — You rely on the reflectors instead of the lights. Reflectors come on top of the required lights; the trailer's rear lights, brake lights and indicators must work, at the same time as the car's.

Why learners get this wrong: The trailer's lighting may burn independently of the towing car.

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Your closed trailer is 6.50 metres long and 1.90 metres wide (permitted maximum mass 900 kg). Which extra light is now required on account of its dimensions?

  1. No extra light — marker lights are not needed on a passenger trailer
  2. Marker lights — the trailer is longer than 6 metres
  3. Position lights — the trailer is wider than 1.60 metres
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Correct answer: Marker lights — the trailer is longer than 6 metres

Why learners get this wrong: Extra marker lights are never needed, not even on a long trailer.

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