data Seoul plans tomonitorthe effectiveness of the signs until the end of the year before deciding whether to expand the project. Similar campaigns have already been trialed in Europe. Antwerp has introduced desig nated walking lanes in a handful of busy shopping streets so smartphone users can look at their mobiles with out bumping into other pedestrians. The German city of Augsburg even installed traffic lights inthepavement at tram crossings forsmartphone gaz A 2014 simulation found that if 1,500 people looking at their phones tried to cross Tokyo's notoriously crowded Shibuya intersection, only about a third would make across without bumping into others, falling or dropping their mobiles