Accessible Parking Space Geometry (2010 ADA Standards 502)
Count is one question and geometry is another, and the van case goes wrong twice. A van space is 132 in -- eleven feet -- UNLESS the aisle is widened to 96 in, in which case the space may drop to 96 in. So there are two legal van layouts, 132+60 and 96+96, and both total 192 in of pavement: which to stripe is a layout decision, not a compliance one, and that usually unsticks a tight lot. The aisle must run the FULL LENGTH of the space, and on ANGLED van spaces must sit on the PASSENGER side -- the one rule flipping the stripes cannot fix. Van spaces, aisles, AND the route serving them need 98 in of clearance.
Formula and source
car space 96 in wide with a 60 in aisle. Van space 132 in wide with a 60 in aisle, OR 96 in wide where the access aisle is 96 in wide - both layouts total 192 in of pavement. The aisle must extend the full length of the space it serves, may not overlap the vehicular way, and on angled van spaces must sit on the passenger side. Van spaces, their aisles, and the vehicular routes serving them require 98 in of vertical clearance. Slopes no steeper than 1:48 in all directions.
2010 ADA Standards for Accessible Design, 502.2 with its exception, 502.3.1 through 502.3.4, 502.4 with its exception, and 502.5. A US federal standard in the public domain, quoted directly.
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