The Orlando Sentinel completed its three-part series “Blood In the Streets” this week, examining Central Florida’s chronic, tragic record of pedestrian crashes, the worst in the country. Using state and federal data, reporters Scott Powers and Arelis Hernandez reviewed thousands of pedestrian crashes to target scores of interviews. Their findings: The problems are rooted in many decades of sprawling development and road planning and a careless culture. Drivers who kill pedestrians face life-changing grief and guilt. Victims and families find little support and no closure from the justice system. And no transportation plans address the ultimate problem: high speed.