What it means
The S-851 sign indicates a priority route. It works as a supplementary panel to represent how the priority road continues at an intersection or point where the priority layout may not be intuitive. It does not create independent priority if it is not read together with the main sign and the rest of the regulation. It usually appears at junctions where the road with priority turns, diverts, or does not match the expected straight path. When you see it, identify whether your route follows the priority itinerary and act accordingly. In the test they often ask you to interpret the itinerary drawing and distinguish it from a mandatory direction.
- CategoryInformation signs
- ShapeRectangular or square, blue
Practise DGT questions featuring this sign
Ten DGT 2026 exam-style questions about signs, with an explanation after each. Free, no signup.
Other related signs
S-250
Gives advance notice of an itinerary
S-260
Gives advance information about lanes
S-261
Advance signing on a conventional road for a service zone or area
S-263
Gives advance information on a motorway or dual carriageway for a service zone or area with a shared exit
S-263A
Gives advance information on a motorway or dual carriageway for a service zone or area with an exclusive exit
S-264
Gives advance information on a conventional road for a service road
S-266
Gives advance notice on a motorway or dual carriageway of a service road with a shared exit
S-266A
Gives advance notice on a motorway or dual carriageway of a service road with an exclusive exit