2024-019 - Santa Ana Vision Zero Plan

Home Browse Search

TOOLBOX OF POTENTIAL STREET IMPROVEMENTS walk. The mountable area slows motor vehicles while allowing large trucks to traverse the mountable area with their rear wheels. A corner radius reduction is similar to a truck apron but instead of a 3-inch high mountable area, the addition is built at the height of the sidewalk. Chicanes / Roadway Curvature Chicanes are a series of narrowings or curb extensions that alternate from one side of the street to the other forming an S-shaped path of travel on a roadway. Chicanes reduce drivers' speeds by causing them to shift their horizontal path of travel. Hardened Centerlines Hardened centerlines are flexible delineator posts or raised speed humps placed along the yellow centerline at an intersection to block the diagonal path through the intersection and encourage drivers to turn left at a slower speed. Pedestrian Refuge Island Refuge islands provide pedestrians and bicyclists a relatively safe place within an intersection and midblock crossing to pause and ob- serve before crossing the next lane of traffic. Raised Crosswalk or Speed Table Speed tables are flat-topped road humps, often constructed with tex- tured surfacing on the flat section. Speed tables and raised crosswalks help to reduce vehicle speeds and enhance pedestrian safety. Fire Departments tend to prefer speed tables since they can be made to accommodate emergency services vehicles. Reduced Conflict Intersection (RCI) This intersection design prohibits through movement and left turns from the side streets, only permitting a right turn in or a right turn out, known as "Right In Right Out" (RIRO). To continue straight or to make a left turn from the side street, cars must first turn right and then make the nearest U-turn. RCls eliminates the potential of broadside crashes. Hardened Centerlines with Flexposts Pedestrian Refuge Island Reduced Conflict Intersection (PQ SANTAANA VISION ZERO PLAN 81