Street works · England
S1 — Monitoring Signing, Lighting & Guarding
Supervising a signed site: checking the survey, monitoring site protection and traffic control, and carrying out site safety inspections.
Who holds this certificate
Supervisors. S1 is a key certificate — every other S unit depends on it.
What it covers
4 topics, 80 questions between them.
Checking the Site Survey
20 questions · 2 with a diagram
Monitoring Site Protection
25 questions · 2 with a diagram
Monitoring Traffic Control
20 questions · 3 with a diagram
Site Safety & Inspections
15 questions · 2 with a diagram
Find It in the Red Book
Open-book questions are not really memory tests — they test whether you can find the right page quickly. These 10 drills give you a heading and ask which document and section it sits under, so looking things up under time pressure becomes automatic.
Try 3 drills freeThe theory test
S1 is assessed by a theory test of 20 multiple-choice questions in 45 minutes. You need 16 out of 20 to pass. The app draws a fresh mock from this certificate's own bank each time and marks it against that pass mark.
Format described as published at the time of writing — confirm it with your assessment centre before you sit the test.
Written against
Every S1 question cites one of these, and the explanation names the clause or paragraph so you can check it yourself.
- Safety at Street Works and Road Works (the Red Book)
- HAUC inspections guidance
- DfT qualifications guidance
- New Roads and Street Works Act 1991
- The Street Works (Qualifications of Supervisors and Operatives) Regulations
NRSWA Street Works Revision is independent revision material. It is not affiliated with, endorsed by or approved by HAUC(UK), SWQR, any awarding organisation or the Department for Transport, and it does not award a qualification or a card.