The New York Times Magazine has an article and slideshow covering Don Meeker's and James Montalbano's creation of ClearView. The magazine article is fun font-nerd article that discusses the dual challenge of increasing the legibility of signs for both daytime and nighttime reading. What started as a challenge for Meeker to replace signs for scenic-tour routes in Oregon ended with the replacement of Highway Gothic, the font that decorates highway signs across the US... until recently. The Federal Highway Administration gave approval for its use in 2004 and Clearview has since become AT&T's new typeface.

You can find out more by visiting Clearviewhwy.com, the official site of the font. There's a FAQ that goes into more detail about the design details of the font and has additional comparisons with Highway Gothic.