Table 3 Summary of the questionnaire and the GPS data a on travel distance and duration averaged by each subject sampling week for workers who commuted by automobiles and had GPS work-related trips (N = 51 person-weeks or 124 person-days)
| Â | Home to work commute | Work to home commute | ||||||
|---|---|---|---|---|---|---|---|---|
| Â | Self-reported trip distance (km) | GPS-based trip distance (km) | Self-reported trip duration (minute) | GPS-based trip duration (minute) | Self-reported trip distance (km) | GPS-based trip distance (km) | Self-reported trip duration (minute) | GPS-based trip duration (minute) |
Number of person-weeks | 44 | 45 | 45 | 45 | 41 | 44 | 44 | 44 |
Trip-level statistics | Â | Â | Â | Â | Â | Â | Â | Â |
Minimum | 1.6 | 1.7 | 4.0 | 3.5 | 1.6 | 1.8 | 5.0 | 3.6 |
Maximum | 64.4 | 59.6 | 60.0 | 99.9 | 88.5 | 62.9 | 90.0 | 106.6 |
Mean | 18.3 | 17.3 | 20.8 | 19.9 | 21.2 | 18.7 | 27.0 | 22.8 |
Standard deviation | 16.7 | 15.1 | 13.8 | 18.1 | 22.4 | 15.7 | 21.8 | 17.9 |
Daily meanb | 12.9 | NA | 16.5 | NA | 14.0 | NA | 17.8 | NA |
|  | Pearson’s correlation coefficient | |||||||
Self-reported trip distance | 1.00 | Â | Â | Â | 1.00 | Â | Â | Â |
GPS-based trip distance | 0.88 | 1.00 | Â | Â | 0.80 | 1.00 | Â | Â |
Self-reported trip duration | 0.85 | 0.85 | 1.00 | Â | 0.93 | 0.77 | 1.00 | Â |
GPS-based trip duration | 0.78 | 0.84 | 0.77 | 1.00 | 0.68 | 0.87 | 0.64 | 1.00 |