Table 5.
Sensitivity analyses including best predictor in each category, all summary measures.
| Indicator Type | Traffic Indicator | Estimate(s), p-value(s) from multivariate model | Model R2 |
| Base model (w/out traffic) | R2 = .74 | ||
| Cumulative Density scores | Unweighted 500 m traffic density (n = 57) | β1 = 4.74*10-4 (.17) | R2 = .75 |
| Summary Measures | Total roadway length: | ||
| 50 meters (n = 57) | β1 = 1.31*10-4 (.35) | R2 = .74 | |
| 100 meters (n = 57) | β1 = 1.48*10-4(.02) | R2= .76 | |
| 200 meters (n = 57) | β1 = 1.42*10-5 (.56) | R2 = .74 | |
| 300 meters (n = 57) | β1 = 5.54*10-6 (.57) | R2 = .74 | |
| Distance-based measures | Distance to nearest designated truck route (n = 57) | β1 = 1.80*10-5 (.62) | R2 = .74 |
| Characteristics of nearest major road | Average daily traffic (ADT) (n = 57) | β1 = -3.04*10-6 (.25) | R2 = .74 |
Final model bolded; models with diesel-based terms italicized. Traffic indicators for PM2.5