What it means
Command: Only farm machinery like tractors and harvesters are permitted on this section of the road.
What to do
- If you are not driving a farm vehicle, stay out of the marked lane or area.
- Check the sign for operating times; outside them the lane is usually open to all.
- Watch for implements entering from fields and farm gates.
In the K53 test
Blue circle means command: the lane belongs to a farm vehicle while the sign applies. Using a reserved lane to jump a queue is the offence being tested.
Where you will see it
Especially in rural areas where slow agricultural vehicles may cross or enter.
