Table 1 Variation in estimated travel time compared to the true travel time for Arizona and New Hampshire.
Method | OVERALL | URBAN | RURAL | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | AVERAGE TIME (min) | MAE1 | RMSE2 | AVERAGE TIME (min) | MAE1 | RMSE2 | AVERAGE TIME (min) | MAE1 | RMSE2 |
ARIZONA | |||||||||
Actual Time | 185 | Â | Â | 98.1 | Â | Â | 197.4 | Â | Â |
Population Centroid | 185.8 | 5.2 | 8.9 | 97.5 | 2.3 | 4.5 | 198.4 | 5.6 | 9.3 |
Geometric Centroid | 201.4 | 21.1 | 34.4 | 99.3 | 3.5 | 7.1 | 215.9 | 23.6 | 36.7 |
Service area based on LandScan | 187.8 | 5.4 | 13.2 | 98.5 | 2.1 | 3.4 | 200.6 | 5.8 | 14.1 |
Service area based on area | 202.5 | 20.7 | 34.7 | 100.9 | 4.0 | 9.3 | 216.9 | 23.1 | 37.0 |
NEW HAMPSHIRE | |||||||||
Actual Time | 41.1 | Â | Â | 12.6 | Â | Â | 42.6 | Â | Â |
Population Centroid | 40.7 | 2.3 | 12.0 | 12.6 | 1.5 | 4 | 42.2 | 2.4 | 12.5 |
Geometric Centroid | 41.9 | 3.0 | 18.1 | 13.7 | 2.1 | 13.1 | 43.5 | 3.0 | 18.4 |
Service area based on LandScan | 41.6 | 2.0 | 11.5 | 12.8 | 1.5 | 4.3 | 43.1 | 2.0 | 11.9 |
Service area based on area | 43.3 | 3.1 | 27.8 | 14.4 | 2.5 | 14.2 | 44.9 | 3.1 | 28.5 |