You are driving a lorry with a maximum permitted mass of 5 tonnes. The road has three lanes in one direction. Which lanes are you forbidden to use if you do not intend to turn or to pass an obstacle?
Explanation
A lorry over 3.5 t may not move further from the right edge of the carriageway than the second lane. So on a three-lane road the leftmost lane is off limits to you, unless you need it to turn, turn around or pass an obstacle.
KET reference: KET 120: lorries with a maximum permitted mass over 3.5 t may not drive further from the right edge of the carriageway than the second lane.