Why do safety signs have pictures on them?

Images on safety signs can reinforce the safety message a workplace sign aims to communicate. Symbols are more easily understood at a glance than text, which might take a little bit of time just by reading it. This is why most safety signs include images that represent a safety hazard. TRADESAFE safety wall signs comply with the OSHA and ANSI standards for images that must be included on safety signs.

Which accident prevention signs have safety suggestions?

What font do safety signs use?