Variable Speed Limits Are Popping Up Across America – Here's How The System Works

A variable speed limit system changes the max speed limit throughout the day. Instead of a static limit, it's based on road ...
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The 5 US States With The Highest Speed Limits (And 5 With The Slowest)

During World War II, the United States imposed what it called a Victory speed limit, lowering the speed limit to 35 mph. This was to aid the war effort, conserving gasoline and rubber for the battle ...