We reviewed all the OSHA accident reports for tower crane accidents dating all the way back to 1984. What we learned from this review is that tower crane accidents are rare and that anything can go wrong when a tower crane is on a job site.
Given the height that is involved and the momentum when something falls from the crane, tower crane accidents have a high likelihood of being fatal.
It is hard to miss a tower crane on a jobsite. There are the massive cranes that are hundreds of feet high. When you are in a city with a lot of construction, it seems as if there is an entire city skyline featuring these cranes.