| 21. | Coleman continued working as an engineer for the state highway department.
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| 22. | State highway money was increasingly diverted to planning the thruway system.
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| 23. | The state highway runs from Highland Springs as a major highway.
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| 24. | The road towards Guntur connects with State Highway 48 at Narakodur.
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| 25. | SR 243 was added to the state highway system in 1970.
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| 26. | SR 78 was officially designated in the 1964 state highway renumbering.
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| 27. | Known as Georgetown Pike, the state highway runs from McLean.
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| 28. | The route was deleted from the state highway system around 1940.
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| 29. | SH 23 intersects one other state highway,, at Booker.
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| 30. | Although unsigned, it appears on the official state highway map.
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