The grade or gradient of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent. It is a special case of the slope, where zero
25% ascent warning sign, Wales
30% descent warning sign, over 1500 m. La Route des Crêtes, Cassis, France
A trolleybus climbing an 18% grade in Seattle
Ascent of German Bundesstraße 10
Baldwin Street, in Dunedin, New Zealand, is located in the residential suburb of North East Valley, 3.5 kilometres northeast of Dunedin's central business district. Guinness World Records calls it the
Grade (slope)
…on mountainous roads with speed limits below 60 mph (95 km/h). The steepest roads in the world according to the Guinness Book of World Records are Baldwin Street in Dunedin, New Zealand, Ffordd Pen Llech in Harlech, Wales and Canton Avenue in Pittsburgh, Pennsylvania. The Guinness World Record once again lists…
A house on Baldwin Street
A woman descends the street
Surveyor Toby Stoff in 2021
The unicyclist has to lean forward to keep his centre of gravity centred over his unicycle's contact with Baldwin Street on the steeper concrete-covered portion of the street.