| A.__Properly registered airmobiles may cross public ways, |
| including bridges, overpasses and underpasses. For crossing |
| public ways, sidewalks and culverts, persons operating |
| airmobiles may travel only the distance necessary, but in no |
| case exceeding 300 yards, for the sole purpose of crossing |
| as directly as possible. For crossing bridges, overpasses |
| and underpasses, persons operating airmobiles may travel |
| only the distance necessary, but in no case exceeding 500 |
| yards, for the sole purpose of crossing as directly as |
| possible. All crossings are subject to the following |
| conditions: |