“2016 survey of departments of transportation found that 17 State DOTs have either researched, tested and/or used UAVs for bridge inspections, accident clearance, surveying, fotography or for identifying, monitoring and mitigating risks posed by land slides, rock slides or flooding.” See More . . .
Source: https://youtu.be/ppvL5CZqumM?list=PLl2me4cCqyo-FvWEpHOgp3wDSsdJg0BH_
By: AASHTO – Transportation TV