An alert adult who can see clearly, walk confidently in any environment, and react quickly to motor vehicles is the exception rather than the rule, and should not be used as the design case. Instead, select street attributes using a variety of “design pedestrians,” discussed in more detail below. All pedestrians benefit from shorter crossing distances, refuge areas, ample room to wait at intersections, intersection control that prioritizes their movement, and sidewalks that are laterally and vertically separate from all but the lowest-speed and lowest-volume traffic. Provide enough room on busy sidewalks for people walking in groups to pass each other. Use pedestrian countdown signals and minimize wait time while maximizing pedestrian signal phase length.