UK Government, the Law and Your Role
What is the difference between a "green" and "amber" traffic light?
AGreen means stop, amber means proceed with caution
BGreen means go, amber means prepare to stop ✓
CAmber means go if it is safe, green means slow down
DBoth mean the same thing — proceed with caution
Explanation
In the UK, green means go, amber (yellow) means prepare to stop as the light will turn red, and red means stop. Amber is also shown briefly with red before turning green (prepare to go).
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