Figure 11 is a pair of line drawing perspectives that illustrate a way of retrofitting an existing
sloping driveway apron that doesn’t have a level sidewalk route across it. In the ‘BEFORE’
condition, a pedestrian using a wheelchair is shown travelling across a compound slope formed by
the flares of the driveway apron with a cross slope of 1:8; arrows suggest the difficulty of the
path of travel. In the ‘AFTER’ configuration, the continuous driveway apron slope has been
divided into three parts: a short segment of steeper slope (1:5), a 3-foot (minimum)-wide level
passage across the driveway, and then another short segment of steeper slope (1:3). The sidewalk
itself also ramps down to the level crossing of the driveway at both sides, in straight ramps with a
maximum slope of 1:12.
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