Longest distance on a curve advisory sign

[jakeroot]

If a sign is fabricated to a standard that is acceptable at the time of fabrication

It wasn't.  Negative contrast was specifically excluded in the IA.

The sign may actually pre-date the interim approval, but I can't say for certain.

Nevertheless, the interim approval did not specifically disallow negative-contrast Clearview. Note that "should" statements are different from "shall" statements (former is recommended, latter is required). This was an interim approval, but, as far as I know, the MUTCD legalese (should vs shall) was still applicable.

[kphoger]

If a sign is fabricated to a standard that is acceptable at the time of fabrication

It wasn't.  Negative contrast was specifically excluded in the IA.

The sign may actually pre-date the interim approval, but I can't say for certain.

Nevertheless, the interim approval did not specifically disallow negative-contrast Clearview. Note that "should" statements are different from "shall" statements (former is recommended, latter is required). This was an interim approval, but, as far as I know, the MUTCD legalese (should vs shall) was still applicable.

But the purpose of the IA specifically included the phrase "use of the Clearview font for positive contrast legends".  That is to say, the purpose of the IA was not for the use of the Clearview font for negative contrast legends, or else it would not have specified positive contrast at all.

[roadman]

If a sign is fabricated to a standard that is acceptable at the time of fabrication

It wasn't.  Negative contrast was specifically excluded in the IA.

The sign may actually pre-date the interim approval, but I can't say for certain.

PA's black on yellow "nanny" signs did predate the IA.

[jakeroot]

Nevertheless, the interim approval did not specifically disallow negative-contrast Clearview. Note that "should" statements are different from "shall" statements (former is recommended, latter is required). This was an interim approval, but, as far as I know, the MUTCD legalese (should vs shall) was still applicable.

But the purpose of the IA specifically included the phrase "use of the Clearview font for positive contrast legends".  That is to say, the purpose of the IA was not for the use of the Clearview font for negative contrast legends, or else it would not have specified positive contrast at all.

I think that's a safe assumption, but the actual guidelines are not as restrictive. I don't think the title of the IA is legally binding, in and of itself.

PA's black on yellow "nanny" signs did predate the IA.

Thanks. I was thinking so.