Nevertheless we collectively don't expect that road and car safety infrastructure should be limited to the front and back fenders on the cars themselves. And neither we even mention those as any notable safety equipment usually, despite each car carrying them. The main safety infrastructure in any industry is something external to the dangerous object. Car fender doesn't 100% protect a pedestrian from being hit and neither does a metal rail on the side of the road. But the effectiveness of both are "slightly" different.
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Nevertheless we collectively don't expect that road and car safety infrastructure should be limited to the front and back fenders on the cars themselves. And neither we even mention those as any notable safety equipment usually, despite each car carrying them. The main safety infrastructure in any industry is something external to the dangerous object. Car fender doesn't 100% protect a pedestrian from being hit and neither does a metal rail on the side of the road. But the effectiveness of both are "slightly" different.