Table 2 Weighted Least Squares Models of VMT
Table 2
Weighted Least Squares Models of VMT
| Dependent variable: annual VMT | Beta | SE | t-stat | P-value |
|---|---|---|---|---|
| Constant | 9,979 | 174.7 | 57.12 | 0.000 |
| Population density | 0.151 | 0.009 | 16.21 | 0.000 |
| Income per household member | 4.01E-02 | 0.003 | 12.72 | 0.000 |
| Vehicle age | 408.0 | 8.753 | 46.62 | 0.000 |
| HH members per vehicle owned | 1,883 | 84.55 | 22.27 | 0.000 |
| LDT indicator | 1,162 | 1,11.0 | 10.47 | 0.000 |
Adjusted R2: 0.123
Number of observations: 26,398 vehicles
Weighted by: 1/household size
Model form: VMT = β′χ + ε, where ε ~ N(0, σ2 x household size)
| Dependent variable: annual VMT | Beta | SE | t-stat | P-value |
|---|---|---|---|---|
| Constant | 10,043 | 175.0 | 57.40 | 0.000 |
| Population density | 0.153 | 0.009 | 16.30 | 0.000 |
| Income per household member | 4.00E-02 | 0.003 | 12.60 | 0.000 |
| Vehicle age | 405.4 | 8.76 | 46.20 | 0.000 |
| HH members per vehicle owned | 1,821 | 85.2 | 21.40 | 0.000 |
| SUV indicator | 1,027 | 189 | 5.44 | 0.000 |
| Pickup indicator | 721.7 | 152 | 4.74 | 0.000 |
| Minivan indicator | 2,150 | 202 | 10.60 | 0.000 |
Adjusted R2: 0.125
Number of observations: 26,398 vehicles
Weighted by: 1/household size
Model form: VMT = β′χ + ε, where ε ~ N(0, σ2 x household size)