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Wind-Tolerant, Autonomous Drones Could Cut Bridge Inspection Costs by 30%
(researchinenglish.com)
This is a most excellent place for technology news and articles.
Visual inspection is an important starting point to determine if you need more extensive testing. You get a sense of the area, bridge type, and age of the bridge. This would be great for younger bridges that are low risk but should have a visual once over every couple years or so.