Imagine this were a workplace: some kind of suspended catwalk where accidentally falling off it is fatal. It would be an OSHA violation not to have guard rails

Imagine this were a workplace: some kind of suspended catwalk where accidentally falling off it is fatal. It would be an OSHA violation not to have guard rails to prevent this from occurring. Likewise, if this is a road where cars are moving too quickly to stop in time to avoid fatally hitting someone who falls onto the road, there ought to be a barrier between the pavement and the road except at designated crossing points.