Clearview typeface

And while we're on the subject of road sign typefaces (see Transport), there's also Clearview, which...

...was developed through over a decade of research by the Texas Transportation Institute and the Pennsylvania Transportation Institute under the supervision of the Federal Highway Administration. The standard FHWA typefaces, initially developed by Caltrans in 1949 and 1950, have long been criticized by those with visual disabilities and senior citizens as being hard to read in bad weather and at night. Clearview was granted interim approval for use on American road signs on 2 September 2004 and is expected to gradually replace the FHWA typefaces over the next few decades.