Table 3. ORNL Comparison of PT and VT Estimates
Friday, November 22, 2024
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Number of Person Trips per Household (PT)
| Add-On Areas | Baseline Standards | Std Err % | % Difference from Baseline | ||||
|---|---|---|---|---|---|---|---|
| C. Div & MSA Size-based | MSA Size-based | CENSUS Division-based | CENSUS Region-based | Regression-based | |||
| New York | 9.91 | 1.16% | 1.32% | 9.61% | 2.03% | 5.29% | -6.52% |
| Wisconsin | 9.90 | 1.13% | 6.80% | 5.86% | 6.74% | 7.67% | -4.98% |
| Texas | 10.31 | 2.17% | 7.94% | 9.63% | 8.69% | 9.20% | -1.33% |
| Baltimore | 9.10 | 1.48% | 11.58% | 14.45% | 16.93% | 14.93% | 5.35% |
| Lancaster | 10.26 | 2.67% | 5.62% | 9.51% | 1.02% | 3.13% | -2.18% |
| Des Moines | 9.50 | 3.41% | 15.19% | 11.33% | 13.97% | 11.65% | 2.75% |
| Kentucky | 8.88 | 2.87% | 9.95% | 17.49% | 14.14% | 16.30% | 2.44% |
| Hawaii | 10.47 | 2.81% | -0.37% | 6.72% | 9.05% | 10.75% | -3.68% |
| Oahu | 10.79 | 2.54% | 11.85% | 9.92% | 8.77% | 10.47% | -5.90% |
| Mean Absolute Deviation | 7.85% | 10.50% | 9.04% | 9.93% | 3.90% | ||
| Number of "Wins" | 2 | 0 | 1 | 0 | 6 | ||
Number of Vehicle Trips per Household (VT)
| Add-On Areas | Baseline Standards | Std Err % | % Difference from Baseline | ||||
|---|---|---|---|---|---|---|---|
| C. Div & MSA Size-based | MSA Size-based | CENSUS Division-based | CENSUS Region-based | Regression-based | |||
| New York | 4.54 | 1.76% | 12.52% | 36.61% | 14.54% | 22.46% | 1.57% |
| Wisconsin | 6.25 | 1.20% | 5.96% | 3.81% | 4.50% | 4.98% | -4.83% |
| Texas | 6.68 | 2.05% | 2.61% | -3.06% | 3.16% | 1.86% | -10.13% |
| Baltimore | 5.30 | 1.86% | 10.84% | 8.98% | 22.31% | 22.49% | 6.28% |
| Lancaster | 6.37 | 3.00% | -0.23% | 7.59% | -17.44% | -11.98% | -2.23% |
| Des Moines | 6.30 | 3.33% | 7.87% | 4.49% | 5.28% | 4.09% | 0.99% |
| Kentucky | 5.80 | 3.07% | 8.82% | 13.38% | 12.02% | 12.40% | -2.59% |
| Hawaii | 6.86 | 2.47% | -9.79% | -1.44% | -6.45% | -3.25% | -12.30% |
| Oahu | 6.25 | 2.89% | 4.34% | 14.77% | 4.65% | 8.15% | -11.46% |
| Mean Absolute Deviation | 7.00% | 10.46% | 10.04% | 10.18% | 5.82% | ||
| Number of "Wins" | 2 | 2 | 0 | 1 | 4 | ||
Percentage difference in bold indicate the method that gives estimates closest to the baseline
Percentage difference in yellow highlight indicate the cluster-based approach gives estimates closest to the baseline
Source: Hu et al. 2007, Table 12. Comparing Baseline Standards to Various Trip-Frequency Estimates, Data from Nine 2001 NHTS Add-on Areas.