A new survey from Safeco Insurance reveals that 30 percent of drivers are more likely to engage in road-rage behaviors during the summer, including tailgating, overuse of the horn, yelling or make obscene gestures. The study also found that the chances of experiencing road rage reach a peak on summer Fridays, as well as while driving to a vacation destination--29 percent of drivers surveyed said they're likely to engage in road-rage behaviors while en route to their vacation spot. Drivers are also 36 percent more likely to rage when a parking spot is stolen from them.