Safety features such as automatic emergency braking and forward collision warnings could prevent more than 40% of crashes in which semis rear-end other vehicles, a new study has found.

The Insurance Institute for Highway Safety, a research group supported by auto insurers, also found that when the rear crashes happened, the systems cut the speeds by over 50%, reducing damage and injuries.

The institute called on the federal government to require the systems on new large trucks and said many truck fleet operators are already adding emergency braking on their own…

Trucks with collision warning systems reduced rear crashes by 44%, while automatic emergency braking cut rear crashes by 41%, the study found.
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