Prioritizing High-Risk Factors
PRIORITY FOCUS AREAS
Prioritizing High-Risk Factors
This plan uses systemic analysis to examine collision history and identify high-risk roadway characteristics . This approach can identify patterns that may not be reflected in standard crash data sources by pairing the crash data with contextual factors , such as the number of travel lanes and roadway speeds , the types and timings of signals , if there are schools , businesses , parks , and if there are other land uses along the road . A systemic analysis broadens the reach of safety countermeasures to streets in Arlington that do not necessarily reflect the most KAB crash locations but are more likely to experience a high severity crash , based on roadway factors and conditions from similar location types .
Based on the analysis , four risk factors are present at locations with the most frequent and most KAB crashes . They include signalized intersections , major arterials , locations near schools , and in disadvantaged communities . These risk factors were then summarized into two crash profiles , which represent focus areas for priority investments .
Signalized Intersections
There are 373 signalized intersections in Arlington . While 19 % of all crashes occur at signalized intersections , these crashes represent 45 % of crashes that result in death , serious injury , or minor injury . Most signalized intersections ( 252 , or 68 %) are along major arterials and account for 70 % of KAB crashes at signalized intersections . Additionally , most KAB crashes at signalized intersections occur at intersections involving at least one four-lane roadway ( 48 %) followed by six-lane roadways ( 26 %) with posted speeds of 40 mph or greater ( 75 %).
28 SAFE STREETS ARLINGTON