A Santa Ana big rig accident at the four-way stop intersection of Saint Andrew Place and Poplar Street has killed a 14-year-old boy riding his bike in the crosswalk, according to a news article in The Orange County Register . Santa Ana police Cpl. Jose Gonzalez said Santa Ana resident Pedro Martinez, 51, was headed west on Saint Andrew Place in a big rig tractor when he hit Esteban Nunez. Nunez reportedly was riding his bicycle southbound in the northbound lane of Poplar and had entered the street intersection without stopping at the stop sign. The boy, a resident of that neighborhood, was not wearing a helmet when he was hit by the moving big rig and dragged under. He was pronounced dead at the scene of the accident. This is such a tragic and heart wrenching accident. Please keep the boy and his family in your prayers. The Insurance Institute For Highway Safety (IIHS) estimates that 770 bicyclists were killed in crashes with motor vehicles in 2006. The most serious injuries among the majority of those killed are to the head, highlighting the importance of wearing a bicycle helmet. In Santa Ana there were four bicyclist fatalities and 107 injuries in 2006. This data comes from the California Highway Patrol . ...