Variable/Type | Estimate | Standard Error | t Value | P value |
---|---|---|---|---|
DISTANCE TO NEAREST FUNCTION CLASS (RI DOT) | ||||
Distance to nearest Class 1 Road* (ppb/m) | -0.00236 | 0.000270 | -8.75 | < .0001 |
Distance to nearest Class 2 Road* (ppb/m) | -0.00296 | 0.000353 | -8.38 | < .0001 |
Distance to nearest Class 3 Road* (ppb/m) | -0.00477 | 0.000450 | -10.61 | < .0001 |
Distance to nearest Class 4 Road (ppb/m) | -0.00330 | 0.00178 | -1.86 | 0.0639 |
TRAFFIC DENSITY WITHIN VARIOUS RADII | ||||
Traffic Density within 100 m* (ppb-day-km 2 /(vehicle-m)) | 0.0155 | 0.00183 | 8.47 | < .0001 |
Traffic Density within 200 m* (ppb-day-km 2 /(vehicle-m)) | 0.0235 | 0.00273 | 8.61 | < .0001 |
Traffic Density within 300 m* (ppb-day-km 2 /(vehicle-m)) | 0.0327 | 0.00353 | 9.25 | < .0001 |
Traffic Density within 400 m* (ppb-day-km 2 /(vehicle-m)) | 0.0427 | 0.00423 | 10.11 | < .0001 |
DISTANCE TO AIRPORT-RELATED LOCATIONS | ||||
Airport Terminal* (ppb/m) | - 0.00178 | 0.000289 | - 6.15 | < 0.0001 |
Runway 16/34 (ppb/m) | 0.000331 | 0.000268 | 1.24 | 0.217 |
Runway 5/23 (ppb/m) | 0.00138 | 0.000435 | 3.17 | 0.0016 |
Airport Centroid (ppb/m) | 0.000344 | 0.000368 | 0.94 | 0.35 |
Airport Fence (ppb/m) | - 0.000379 | 0.000571 | - 0.66 | 0.51 |
TRAFFIC-RELATED VARIABLES | ||||
ADT-weighted road length within 100 m* (ppb-day/vehicle-m) | 0.00000056 | 0.00000007 | 8.06 | < 0.0001 |
ADT-weighted road length within 200 m* (ppb-day/vehicle-m) | 0.00000024 | 0.00000003 | 8.64 | < 0.0001 |
Length of Class 1 roads within 100 m* (ppb/m) | 0.0325 | 0.00473 | 6.86 | < 0.0001 |
Length of Class 1 roads within 200 m* (ppb/m) | 0.0102 | 0.00169 | 6.05 | < 0.0001 |
Length of Class 2 roads within 100 m*(ppb/m) | 0.0169 | 0.00242 | 6.97 | < 0.0001 |
Length of Class 2 roads within 200 m*(ppb/m) | 0.00726 | 0.000934 | 7.78 | < 0.0001 |
Length of Class 3 roads within 100 m*(ppb/m) | 0.0159 | 0.00201 | 7.92 | < 0.0001 |
Length of Class 3 roads within 200 m*(ppb/m) | 0.00722 | 0.00081 | 8.95 | < 0.0001 |
Length of Class 4 roads within 100 m (ppb/m) | - 0.000924 | 0.000716 | - 1.29 | 0.20 |
Length of Class 4 roads within 200 m (ppb/m) | - 0.000411 | 0.000232 | - 1.77 | 0.08 |
Length of all roads within 100 m*(ppb/m) | 0.00297 | 0.000705 | 4.22 | < 0.0001 |
Length of all roads within 200 m* (ppb/m) | 0.000649 | 0.000220 | 2.95 | 0.0032 |