This bill requires the Department of Homeland Security — the federal agency responsible for protecting the country from terrorism and other security threats — to write a report for Congress about how it's working to stop attacks where vehicles are used as weapons, like someone deliberately driving a car or truck into a crowd. The report has to look at which places (like airports or government buildings) are most at risk, how DHS is working with police at every level of government to prevent these attacks, and what new technology could help detect or stop them. Most of the report will be kept classified, meaning the public won't see the full details, but DHS does have to post a public summary online and personally brief members of Congress on what it found. In practice, this doesn't create any new rules for drivers or the public — it's mainly about pushing the government to study the problem and share its plans with lawmakers.