According to the Guinness Book of World Records
, Pittsburgh is home to the second steepest public road—and that’s just because of a measuring mistake.The first steepest was thought to be in New Zealand.
ran an infographic featuring the 10 steepest climbs in the US that was created by fixr
. Canton Avenue, with its 37 percent grade is second on the list after Waipio Rd. in Honokaa, Hawaii, a road on which only four-wheel-drive vehicles are permitted.