Elaborating on this somewhat.<p>Let say, for example, that the interfloor distance in your city residential building is 150&quot;.  According to ADA codes, the maximum slope for a ramp is 1:12.  The maximum rise for a ramp is 30&quot;, requiring a landing before and after at least 60&quot; long.<p>So to climb one story in the ramped building, you need 5 ramps total, plus 6 landings.  Each ramp is 360&quot; long, and each landing 60&quot; long.  The total horizontal distance, per floor, is 2160&quot;, or 180&#x27;, or 55m.  The minimum width of a ramp is 36&quot;.  Your ramp area is going to be at least 540ft^2 (51m^2).  On each floor.<p>In contrast, each elevator takes up about 27ft^2 (2.5m^2) per floor.  You could have 20 elevators operating in the same space as a ramp only wide enough for one person to use at a time.<p>And if you live on the 11th floor, are you really going to ride your bike around in tight circles for <i>at least</i> a third of a mile just to reach street level?  Or are you going to ride to the bike-through elevator and have it move you that vertical distance instead?<p>So when I imply that the architect that puts bike ramps on the inside of high-rise buildings will eventually be homeless, it is only because that person suffers from a fundamental disconnect from reality that is so much worse than just a simple lack of common sense.  New passenger elevators in urban high-rise buildings are probably the most efficient vehicles for moving people between locations that currently exist.