Slow agricultural vehicles may be travelling on the road ahead.
Watch for tractors entering, crossing or travelling along the road. They may move slowly or turn into farm access roads.
The United States W11-5 shows a black tractor on a yellow diamond. The warning covers agricultural traffic entering or sharing the road.
Official sign in each country; the code is its number in the national rules. Signs that come in two directions show the left and the right version.
Sign images from Wikimedia Commons, used under their licences.
