Today, the California Highway Patrol and state officials will gather to celebrate and release new data that show that people are dying on California's roadways at the lowest rate since 1933, when what’s known as the “Mileage Death Rate” — the number of traffic fatalities per every 100 million miles of vehicle travel — began.  California also had the largest reduction in roadway fatalities nationwide from 2006 to 2007, from 4,240 to 3,974, according to a recent report by the National Highway Traffic Safety Administration.