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<br />City of Santa Ana | First Street Multimodal Corridor <br />Technical Memorandum <br /> <br />15 <br /> <br />The section east of Garfield (between Garfield Street and Standard Avenue) experienced the <br />highest percentage of daily traffic traveling at a speed greater than 40mph at 8,687 vehicles per <br />day or 26% of the daily traffic on the segment. <br />Why is this important ? Figure 7 illustrates the probability of fatality in a pedestrian-vehicle crash based <br />on vehicle speeds . The curves represent different age ranges . According to data collected by the <br />Automobile Club of A merica (AAA) and illustrated by ProPublica in an interactive graph, a 70-year-old <br />person has a 70% chance of being killed by a vehicle traveling at 40mph. While young adults have a <br />higher chance of surviving a crash at 40mph, the probability of fatality increases exponentially as <br />speeds increase with the chance of any pedestrian surviving being struck by a vehicle moving at <br />60mph of less than 10%. Identifying solutions to reduce the traffic speeds of these high-speed <br />vehicles will significantly improve safety and reduce both severe injury crashes and fatalities . <br />Figure 7. Fatality Rates as a Function of Traffic Speed <br /> <br />Source: “Impact Speed and a Pedestrian’s Risk of Severe Injury or Death”, Brian Tefft (1998) – AAA <br />Foundation for Traffic Safety. <br />