Here are some more old signs:
These are from Tennessee in 1954.
These were contributed by David Backlin.

Some State highway markers found on a Texaco map from 1930.
This was common practice at the time-most map makers
would include the highway markers for a state
and adjoining states on their maps.

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“Other Stuff” index
David Backlin's picture pages
Other old signs
Look at the 1946 PA sines again! Ha!