| Normalized idling duration (min/year-squaremile) |
| 0.000000 - 66840.953308 |
| 66840.953309 - 153256.323641 |
| 153256.323642 - 246302.076242 |
| 246302.076243 - 342958.486941 |
| 342958.486942 - 469265.469609 |
| 469265.469610 - 627709.847030 |
| 627709.847031 - 855353.105766 |
| 855353.105767 - 1262021.594660 |
| 1262021.594661 - 2114919.461910 |
| 2114919.461911 - 158551323.563000 |