Descriptive characteristics of neighbourhood characteristics
| Green streets | Crosswalk present | Commercial/apartment building | |
| Mean (SD) | Mean (SD) | Mean (SD) | |
| Salt Lake City | 59.0 (49.2) | 8.0 (27.1) | 38.5 (48.7) |
| Chicago, Illinois | 71.2 (45.3) | 22.5 (41.8) | 55.8 (49.7) |
| Charleston, West Virginia | 78.6 (41.0) | 3.4 (18.1) | 44.9 (49.7) |
| N | 2 26 875 | 1 50 300 | 53 360 |
Neighbourhood characteristics derived from street images collected between December 2016 and February 2017 from Google’s Street View Image API.