Blind summit plate: what it means
The plate warns of a blind summit ahead. Do not overtake where you cannot see far enough ahead to know it is safe.
What does the blind summit plate mean?
The plate warns of a blind summit ahead. It names the hazard beneath the other danger triangle. Know your traffic signs explains that the plate tells you what the danger is.
Rule 166 says not to overtake where you cannot see far enough ahead to be sure it is safe. It specifically includes approaching the brow of a hill.
Quick quiz
What does the sign at the top of this page mean?
- A blind summit is ahead.
- A humped bridge ahead.
- Road humps ahead.
Show answer
A. A blind summit is ahead. The plate identifies a blind summit as the hazard ahead (Know your traffic signs). Source: Know your traffic signs: warning signs, GOV.UK; The Highway Code, rule 146, GOV.UK; The Highway Code, rule 166, GOV.UK; Traffic sign images: image details (spreadsheet), Department for Transport, GOV.UK; Traffic sign images, Department for Transport, GOV.UK
Where will you see it?
Before a blind summit, below the other danger warning triangle.
What should you do?
Adjust your speed to the road conditions. Do not overtake if you cannot see far enough ahead to be sure it is safe.
What do people get wrong?
Do not assume an overtake is safe when your view ahead is limited. Rule 166 specifically includes approaching the brow of a hill.
Common questions
What does the Blind summit sign warn of?
It warns of a blind summit ahead. The plate names the danger shown by the warning triangle.
Can I overtake approaching the brow of a hill?
Rule 166 says not to overtake if there is any doubt or you cannot see far enough ahead to be sure it is safe. Approaching the brow of a hill is one of its examples.
Compare with
Want to test someone else? Play a road-sign quiz with friends and family.
Sources
Checked on 5 November 2026 against Know your traffic signs (warning signs), The Highway Code rules 146 and 166 and the Department for Transport’s image details list.
- Know your traffic signs: warning signs, GOV.UK
- The Highway Code, rule 146, GOV.UK
- The Highway Code, rule 166, GOV.UK
- Traffic sign images: image details (spreadsheet), Department for Transport, GOV.UK
- Traffic sign images, Department for Transport, GOV.UK
Contains public sector information licensed under the Open Government Licence v3.0. Traffic sign images are Crown copyright, from the Department for Transport. Sources and image credits.