It was found that when light reflected off of signs with the old Highway Gothic font, it could cause certain letters — like lowercase A, E, and S — to glow and become hard to distinguish ...

Pennsylvania was the very first state to implement new signs with the Clearview font. Later on, more states would start using it in their signs. But only 12 years later, in 2016, the FHWA found ...

The new font solved that problem by creating more space inside the letters, so the glow when headlights hit them does not cover them up, Penn State noted. Pennsylvania was the very first state to ...