Curb service" poster
The pattern
This still is filed under Public health warning.
Define
A warning designed to change a health behavior (stop, screen, stay home), not to sell a brand.
Mechanism
Fear with a next step. The threat is specific. The action is doable today. Fear without an action is cruelty.
Verdict
The risk is real and the action is clear. Official or civic voices help.
Why it works
The traffic light instantly evokes the concept of 'curb' and driving, emphasizing speed and modern convenience applied to a traditional institution like the library.
Steal this when
You are advertising a modernization or convenience-upgrade to an existing service.