Even the calmest drivers have experienced an occasional moment of road rage at the hands of a rude or inconsiderate motorist. But what's most likely to set drivers off?

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According to a new study by travel site Expedia, some of the most rage-inducing behaviors are slowpokes who won't move out of the left lane, tailgaters and people who text while driving. Read MoreThe road rage capital? It's not New York City The report was released in conjunction with Memorial Day weekend, the traditional start of summer and the busiest highway travel season of the year. "As the unofficial start of summer, Memorial Day sees a huge spike in the number of drivers on the road," said Expedia General Manager John Morrey. "The rule, as with airplanes and hotels, is that shared spaces demand decorum and attentiveness." Despite the fact that almost every state has a law against texting while driving, the risky act is still unpleasantly common. It was rated by 69 percent of the drivers surveyed as the activity most likely to get their blood boiling.