On the A28 near Zwolle, early evening, your engine cuts out. You are on the hard shoulder, the hazard lights are already blinking and your car is clearly visible to the traffic behind. What applies to the warning triangle?

Not mandatory — but wise to place it anyway

Mandatory, because a warning triangle is required in a breakdown

Explanation

False — trap: duty without its exception. With blinking hazard lights and a clearly visible car the triangle is not mandatory (Book p.169).