| Interstates | Non-Interstates | Rural | Urban | IN | OH | PA |
Min | 2.3 | 2.8 | 2.7 | 2.3 | 2.5 | 2.4 | 2.3 |
Max | 6.1 | 9.8 | 6.4 | 9.8 | 9.8 | 8.3 | 5.9 |
Mean | 4.0 | 4.9 | 4.3 | 4.4 | 4.6 | 4.5 | 3.9 |
Median | 3.9 | 4.6 | 4.2 | 4.4 | 4.6 | 4.3 | 4.0 |
Standard Deviation | 1.0 | 1.2 | 0.9 | 1.4 | 1.2 | 1.2 | 0.9 |