Current style Washington interstate signs are square with the interstate shield against a white background. (Photo by Joe Koehler).
Older style Washington intersate sign with the state name. Not too many of these left outside Seattle. (Photo by Joe Koehler).
A sign that shouldn't exist. State highway workers made and posted this sign along WA-530 which leads into the highway garage. There was so much traffic along that road, it's like an interstate - they reasoned. This sign was never posted along the road itself, rather it was posted inside the state garage grounds (Photo by Joe Koehler).
Washington was one of a handful of states that dropped the "US" from its US highway signs after 1956 when the restrictions were relaxed. Note the unusual fonts for the "99". (Collection of Robert Edgar).
A slightly older version of the current style of state route markers. Newer signs use a larger font for one and two-digit numbers. Older signs, such as this one, used the three-digit font regardless of route number. (My collection).
Current style Washington State marker on the road. This is the "companion" sign to the I-530 sign above. (Photo by Joe Koehler).
Older style Washington sign. This style sign appears in the 1939 official map of Washington State; however, this sign is probably from the 1950's or 60's. (Photo by Joe Koehler)