They're just now seeing the problem?
Yeah a local bridge had a suicide problem which went above an expressway parkland and a river. Needless to say if the body fell on the expressway or vehicles below it was a much bigger problem than just the person jumping. Not cheap but they installed an elaborate barrier that prevents anyone from jumping and that solved the problem.
You should see the Peter Skene Ogden viewpoint in central Oregon, where U.S. 97 crosses the Crooked River north of Redmond. There’s a part of the publicly-accessible area where the only barrier is a stone wall a little over two feet high that runs literally along the edge of a 300-foot drop, as in when you lean over the wall you are looking straight down to the river. The wall’s not even waist high to an adult and it’s been like that since the park was built, though they moved the parking area back from the edge some years ago. I just looked on Google Earth, and the wall is still the same, as of last month.
I don’t know how often people commit suicide at that location. I never heard of any, though I have heard of dogs hopping over the wall only to discover that it’s a LOT higher on the other side. In 1961 two women threw the bodies of two murdered children into the gorge from the nearby highway bridge.