The crash attenuators are usually good enough to save people's lives. There are small grooves in the sides on some of the freeways in CA but they aren’t everywhere.
The problem with the attenuators are that they don’t get replaced fast enough which makes these accidents a lot deadlier.
The problem with the attenuators are that they don’t get replaced fast enough which makes these accidents a lot deadlier.
You can see the difference between a used and unised attenuator in this article. http://abc7news.com/automotive/tesla-claims-missing-safety-b...