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The Denny Regrade in process, Seattle, Washington (1900s).
The Denny Regrade in process, Seattle, Washington (1900s).
Regrading for a subdivision in the Santa Monica Mountains, Los Angeles, California (1970s).
Regrading for a subdivision in the Santa Monica Mountains, Los Angeles, California (1970s).
Modern road grader
Modern road grader
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25% ascent warning sign, Wales
25% ascent warning sign, Wales
30% descent warning sign, over 1500 m. La Route des Crêtes, Cassis, France
30% descent warning sign, over 1500 m. La Route des Crêtes, Cassis, France
A trolleybus climbing an 18% grade in Seattle
A trolleybus climbing an 18% grade in Seattle
Ascent of German Bundesstraße 10
Ascent of German Bundesstraße 10