Streets 320,000 - 999,999 (1)
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Streets 160,000 - 320,000 (2)
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Streets 80,000 - 160,000 (3)
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Streets 40,000 - 80,000 (4)
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Streets 20,000 - 40,000 (5)
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Streets 10,000 - 20,000 (6)
| Interstate |
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| Major Road; Major Road |
| Minor Road; Minor Road |
| Access Road |
Streets 4,800 - 10,000 (7)
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| Major Road; Major Road |
| Minor Road; Minor Road |
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Streets 2,400 - 4,800 (8)
| Interstate |
| State Route |
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| Major Road; Major Road |
| Minor Road; Minor Road |
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Streets 1,200 - 2,400 (9)
| Interstate |
| State Route |
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| Major Road; Major Road |
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| Minor Road; Minor Road |
| Access Road |
Streets 600 - 1,200 (10)
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