Free Safety Signs - What fonts (or similar) are used for Airport Signs or Air Safety Cards and where can I find them for free?

What fonts (or similar) are used for Airport Signs or Air Safety Cards and where can I find them for free?

Public Comments

http://www.designworkplan.com/design/airport-signage-photo-inspiration.htm
Frutiger was designed specifically for Charles de Gaulle airport. I will not promote piracy of fonts.

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