About Placing the warning triangle when breaking down on the hard shoulder: which statement is WRONG?
The warning triangle is always mandatory when you break down on the hard shoulder, even when your hazard lights are blinking and your car is clearly visible.
The photo caption says: 'Place the warning triangle about 30 metres behind your car', with no separate rule for the motorway.
The sentence explicitly ends with '(but it is wise)'.
The location information for roadside assistance is on the hectometre marker: road number, hectometre reading and left/right — not on a place-name sign, which is often far away or absent.
Explanation
trap: duty without its exception. Book p.169 - 'If your hazard lights are blinking and your car is clearly visible, that is not mandatory (but it is wise).' The duty only applies if the car forms an obstacle that approaching drivers cannot see in time