Table 4 - Regression Results
| Author | Independent variables | d.f. | R2 (percent) | ||
|---|---|---|---|---|---|
| Effectiveness | Cost | Implementation | |||
| Arnold | +0.51* | -0.28*** | -0.57* | 49 | 39.3 |
| Downs | -0.32** | -0.62* | -0.35** | 19 | 75.4 |
| Zupan | -0.45* | +0.39* | -0.56* | 18 | 78.3 |
| Dueker et al | -0.84* | NA | -0.04 | 9 | 67.8 |
| Booz-Allen Hamilton | -0.22*** | NA | -0.70* | 28 | 52.2 |
* significant at 0.01 level
** significant at 0.05 level
*** 1.00 < t < 2.00
d.f. = degrees of freedom
HOV = high-occupancy vechicle
NA = not applicable
SOV = single-occupancy vehicle
SRSD = studentized residual
TDM = travel demand management
TMA = transportation management association
TSM = transportation system management
U = data are unavailable
VHT = vehicle hours of travel
VMT = vehicle-miles traveled
* Significant at 95% confidence interval.
Updated: Saturday, May 20, 2017