Re:These are perfect venues for cyclists because the maximum grade is somewhere around 4 percent, which is the steepest grade engines can pull.

my son noted that Polling stations in SF all note the grade and number of steps to each site--so those in wheelchairs or with other disablilities can plan ahead.

He uses this yearly election matterial to plan his own routes. Not every street has its grade marked, but many do on the election site map.