Between Loomis and Applegate there are some mutated I80 signs, some much narrower than the direction sign or with goofy sized letters.
In Nevada, about 1/3 rd of the roadside shields are the lettered
and the very first one on East Bound I80 in Nevada is that kind. The
are the big numbered, unlettered variety. The freeway entrances
almost a 50/50 mix of the two.
Nevada's Stereotypical Sign
(Large Numbers, no letters)
Most roadside signs like this are grayer and older.
Idaho's Shields are probably a bit smaller but follow the same pattern.
Lettered style, usually done with darker paint (but not this particular sign) and with smaller numbers.
Nevada I80 West sign
This is taken near Wells, at Exit 343.
Note the National Forest in the background.
California's stereotypical freeway entrance sign.
It is similar to the above sign but much it is smaller.
A California sign
This is similar to the large number Nevada sign.
There are large numbers.