| 21. | State Route 13 was formed out of the 1964 state highway renumbering.
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| 22. | These were not affected by the 2006 platform renumbering scheme.
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| 23. | Route 198 was renumbered SR 67 in the 1964 state highway renumbering.
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| 24. | In 1991, a smaller renumbering of state highways occurred.
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| 25. | SR 75 was not officially designated until the 1964 state highway renumbering.
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| 26. | As a result of the renumbering, the 36F became the 456.
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| 27. | The E prefix was dropped on the SR's 1931 renumbering.
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| 28. | There was some renumbering done in 1927 to avoid overlapping route numbers.
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| 29. | In the mid 1970s, Nevada began renumbering their state highway system.
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| 30. | On July 1, 1976, Nevada began renumbering its state highways.
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