To me, Clearview isn't awful, but those "l"s remind me of why I can't stand it; it's just like the Windows font "Trebuchet": l (Note: you probably won't see the difference unless you have the font on your device.)
They don't lead into the next letter, but they distract, in my opinion. The the finishing "stroke" of the "a" and the "d" aren't the same, which is also annoying. Otherwise, Clearview does look quite crisp when spaced properly; I see it outside of Florida, and sometimes it looks right, other times...not so much.
That said, I like my "traditional" highway fonts, like FHWA. Helvetica looks okay, but I think it doesn't work well for a large block of text, or when viewed at speed.
I tried to make it look cool in Texas, though...