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In most states (all?) "passing on the right" does not mean passing someone on the right in a regular traffic lane. It refers to passing people while in an exit

• ghaff 10y ago
  In Massachusetts, passing on the right on a divided highway is legal. I'd argue that in a lot of cases, it's the fault of drivers on the left not moving out of their lane. But you also have situations where, with lanes of steady traffic, the right lane just gets moving faster. Now, yes, you get situations where people veer from lane to lane because the overall flow of traffic isn't fast enough for their tastes. But, especially on three lane each direction roads, you get cars and trucks that don't want to deal with merging traffic at exits just sitting in the middle.