Table 3Empirical Results for Trip Duration Model
Wednesday, November 30, 2011
Table 3
Empirical Results for Trip Duration Model
| Variable | Coefficient | t-statistic |
|---|---|---|
| Constant | 2.504 | 76.81 |
| Trip purpose | ||
| Production end (nonhome-based trip is base) | ||
| Home-based | 0.213 | 16.16 |
| Attraction end (work purpose is base) | ||
| School | 0.041 | 1.56 |
| Social-recreational | 0.125 | 5.11 |
| Shopping | 0.299 | 16.07 |
| Other | 0.215 | 13.07 |
| Time-of-day variables ("evening" period is base) | ||
| morninga.m. peak/p.m. peak | 0.445 | 15.57 |
| a.m. offpeak/p.m. offpeak | 0.176 | 6.75 |
| Time of day and trip purpose interaction effects | ||
| morninga.m. peak/p.m. peak x nonwork | 0.155 | 11.23 |
| a.m. offpeak/p.m. offpeak x social-recreational | 0.261 | 8.94 |
| Zonal and trip-related attributes | ||
| Zonal size-related variables | ||
| Zonal area x 10 5 | 1.243 | 2.56 |
| Zonal acreage in office space x 10 3 | 2.363 | 3.85 |
| Number of people in service employment x 10 5 | 2.544 | 9.75 |
| Zonal acreage in manufacturing facilities x 10 4 | 6.917 | 5.19 |
| Zonal acreage in retail facilities x 10 3 | 2.266 | 4.82 |
| Zonal acreage in institutional facilities x 10 3 | 1.020 | 2.54 |
| Zonal nonsize-related variables | ||
| Zonal household density x 10 3 | 1.612 | 4.42 |
| Median income of zone x 10 6 | 2.576 | 6.55 |
| Presence of an airport or airport-related infrastructure x 10 2 | 5.342 | 2.56 |
| Trip-related variables | ||
| Intrazonal trip | 0.777 | 33.95 |
| Intrazonal p.m. peak trip | 0.189 | 5.08 |
| Intrazonal shopping/social-recreational trip | 0.158 | 6.12 |
| Number of observations | 19,455 |
| Regression sums of squares | 2,737.09 |
| Residual sums of squares | 11,058.14 |
| Standard error of estimate | 0.754 |
| R2 | 0.198 |
| Adjusted R2 | 0.198 |