| Clue | Source | Date |
|---|---|---|
| Designated spaces for some riders | The Washington Post | 07 May 2020 |
| Designated spaces for some riders | LA Times Daily | 07 May 2020 |
| Features of some city streets | New York Times | 03 Feb 2017 |
| Features of some city streets | ||
| Bad places to drive | ||
| City cyclists' concerns |