Walking and Talking: The Effect of Smartphone Use and Group Conversation on Pedestrian Speed.

Camera Layout, Broadway study site

Recent working paper:

By testing the walking speed of groups of pedestrians and of phone users, followers of groups and of phone users, and of people uninfluenced by phone users and groups, from different sites it could been seen that groups of people and phone users, and often followers of phone users, walk significantly slower than people uninfluenced by phone. In a narrow path people in groups and phone users not only slow themselves down but also slow the people behind. The rise of the smartphone correlates with a reduction in walking speed.