Table 1 GIS variables used in model-building
Variable category/type | Variable(s) (units) | Units |
|---|---|---|
Distance to nearest road class | Distance to nearest Class 1 Roadway (RI DOT) | m |
| Â | Distance to nearest Class 2 Roadway (RI DOT) | m |
| Â | Distance to nearest Class 3 Roadway (RI DOT) | m |
| Â | Distance to nearest Class 4 Roadway (RI DOT) | m |
Traffic density | Traffic density within various radii (100, 200, 300, 400 m) | vehicles/day/km2 |
Distance to airport proxies | Distance to airport terminal | m |
| Â | Distance to Runway 16/34 | m |
| Â | Distance to Runway 5/23 | m |
| Â | Distance to airport centroid | m |
| Â | Distance to airport fence line | m |
Total length of proximate roadways | Total length of Class 1 roadways (within 100-400 m) | m |
| Â | Total length of Class 2 roadways (within 100-400 m) | m |
| Â | Total length of Class 3 roadways (within 100-400 m) | m |
| Â | Total length of Class 4 roadways (within 100-400 m) | m |
| Â | Total length of all roadways (within 100-400 m) | m |
Total length of proximate roadways, weighted by wind rose (fraction of time by direction, 8 segments) | Total length of Class 1 roadways, weighted (within 200 m) | m |
| Â | Total length of Class 2 roadways, weighted (within 200 m) | m |
| Â | Total length of Class 3 roadways, weighted (within 200 m) | m |
| Â | Total length of Class 4 roadways, weighted (within 200 m) | m |
Traffic-weighted road length | ADT-weighted road length (within 100-400 m) | vehicle-meters/day |