Is Clearview 6-W really an equivalent to FHWA Series F?

[Pink Jazz]

According to the FHWA website, Clearview 6-W is an equivalent to FHWA Series F.  However, the ClearviewHwy website disagrees, stating that Clearview 6-W has no FHWA equivalent.  Which is true?  Series F isn't very commonly used, so perhaps there was no need to develop an equivalent for it.

[Quillz]

It's an equivalent in the sense that it's the widest variant of Clearview offered. However, IIRC, the x-W fonts are actually slightly narrower than the equivalent Series X fonts, to compromise the fact that white numerals have the optical illusion of appearing wider than they really are. So, the actual equivalent to Series F would be Clearview 6-B. Again, as far as the font families go.