TABLE III.
Work History and Driving Practices, Survey of U.S. Long-Haul Truck Drivers, Fall 2010
| Description | Weighted national estimatea | 95% Confidence interval | Number of drivers observed (out of N = 1,265) |
|---|---|---|---|
| Mean number of years worked as a long-haul truck driver | 16.4 | (14.4, 18.5) | 1,265 |
| Mean miles driven in past 12 months | 107,668 | (101,407, 113,929) | 1,262 |
| Mean total number of hours worked in last 7 days | 60.4 | (56.3, 64.5) | 1,265 |
| Average hours on task | |||
| Driving | 46.2 | (44.2, 48.2) | 1,259 |
| Waiting for dispatcher, completing paperwork | 7.3 | (6.0, 8.6) | 968 |
| Loading/unloading/securing the load | 2.9 | (1.8, 3.9) | 592 |
| Truck maintenance or repair | 1.8 | (0.7, 2.8) | 553 |
| Driving practice on current trip | |||
| Driving alone | 78.2% | (70.4, 86.0) | 1,003 |
| Driving with others | 21.8% | (14.0, 29.6) | 262 |
| Type of freight shipment on current trip | |||
| Less than truckload freightb | 16.1% | (11.5, 20.7) | 212 |
| Truckload freightc | 74.6% | (68.0, 81.1) | 942 |
| Don’t know/refused/missing | 9.4% | (5.9, 12.9) | 111 |
| Drivers with a second job | 2.2% | (0.9, 3.4) | 37 |
| Union membership | 2.6% | (1.1, 4.1) | 39 |
| Number of days sleeping at home in past 30 days | |||
| 0 days | 18.3% | (14.1, 22.5) | 250 |
| 1–6 days | 44.6% | (39.8, 49.5) | 558 |
| 7 or more days | 37.1% | (30.3, 43.9) | 456 |
| Don’t know/refused/missing | 0.02% | (0.0,0.07) | 1 |
| Hours usually driven before stopping for a break or fuel | |||
| 4 hr or less | 49.3% | (45.9, 52.6) | 594 |
| Between 5 and 8 hr | 42.0% | (39.6, 44.4) | 545 |
| More than 8 hr | 7.2% | (5.2, 9.3) | 109 |
| Don’t know/refused/missing | 1.5% | (0.2, 2.8) | 17 |
a
Weighted national estimates using 1,265 survey responses.
b
Less than truckload (LTL) freight is defined as carrying multiple shipments each under 10,000 lbs to be delivered to one or more terminals or receivers [Burks et al., 2010].
c
Truckload (TL) freight is defined as carrying one or more shipments each over 10,000 lbs to be delivered directly to one or more receivers [Burks et al., 2010].