The technology is intended to address the huge number of accidents caused by unintentional lane changes. Iteris claims that over 1.5 million accidents and 23,000 fatalities per year㬳% of the totalresult from such problems. We would have been pretty skeptical of those numbers if not for a discussion a staffer had recently with a California Highway Patrol officer who works one of those long, straight boring sections of Interstate 5 running through California's central valley. The CHP offer said that a significant majority of accidents he responds to are caused by drivers who drift off one side of the highway because they are sleepy or distracted, then over-correct when they realize it, swerve back across the road, and&$151unless they collide with another vehicle along the waydepart the road and wad themselves up on the opposite shoulder. It remains to be seen whether drivers alerted by the LDWS will overreact in a similar way.