Why is it illegal to pass someone on the right on the highway in the US? In Canada if there’s a three lane highway which, in my case, isn’t very prominent, there’s really no law that enforces it, it’s more of a respect thing here on two lane highways both ways if someone is going slow in the left lane to go into the right but I’m just curious as to why it’s actually enforced in the US?

  • HobbitFoot
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    7 months ago

    There are laws to enforce it, but actual enforcement is light.

    As to why this is a law, it comes down to safety. It is generally safer that traffic speeds have a gradient in one direction. The left lanes are less likely to see merging of traffic and the driver is on the left side, making it easier for the driver to notice passing traffic.