The collapse of the bridge in Genoa, Italy remind me of when I was studying in Seattle, Washington State, USA. At that time I read in the newspaper a bridge collapsed in the nearby. Maybe 2 years later, when I left the Seattle for quarel between US Government Embassy and Iran, it was the Mount St. Helene eruption. It is possible that the collapse is due to vibrations. therefore, it is necessary to follow seismic activity of the region as Nice area is a seismic region. Just for precautions and I do not want to worry you about.