That's according to new data from Society of Automotive Engineers, which stated that failure to signal causes 2-million collisions per year.
The study found drivers in the United States use their turn signals only half the time when changing lanes, and a 75% of the time when making a turn.
Engineers are recommending that authorities need to crack down on repeated offenders. They also suggested that new cars should be equipped with a warning system to remind driver.
Source: CBS Philadelphia