Table 7 Sensitivity analyses including best predictor in each category, all summary measures.

Null model

R² = .39

Cumulative density scores:

Unweighted traffic density in 100 m

* Obs nearest Major Road (n = 50)

β1 = 0.055 (.004)

β2 = -0.051 (.004)

R² = .55

Kernel-weighted density in 50 m

* Obstructed (n = 50)

β1 = 0.034 (.02)

β2 = -0.056 (.002)

R² = .55

Density of urban roads (>8500 cars/day) in 200 m

* Obstructed (n = 50)

β1 = 589.4 (.049)

β2 = -760.9 (.0095)

R² = .52

Summary measures:

Total roadway length within:

50 meters

* Obstructed (n = 50)

β1 = 0.0144 (<.0001)

β2 = -0.0094 (.005)

R ² = .56

100 meters

* Obstructed (n = 50)

β1 = 0.0022 (.34)

β2 = -0.0042 (.005)

R² = .54

200 meters

* Obstructed (n = 50)

β1 = 9.28*10^-4 (.22)

β2 = -1.25*10^-3 (.008)

R² = .52

300 meters

* Obstructed (n = 50)

β1 = 2.31*10^-4 (.55)

β2 = -6.65*10^-4 (.0095)

R² = .50

Vehicle Miles Traveled in 200 m

* Obstructed (n = 50)

β1 = 1*10^-7 (.21)

β2 = -1*10^-7 (.10)

R² = .47

Distance-based measures:

To nearest highway (>19,000/day)

* Obstructed (n = 50)

β1= 0.0176 (.12)

β2 = -0.0195 (.07)

R² = .50

Characteristics of nearest major road:

Trucks per day on nearest major road * Obstructed (n = 34)

β1 = .0061 (.01)

β2 = .00596 (.01)

R ² = .59