But you have to estimate where it was for yourself — probably just at the place where the slight downhill grade becomes null for a few feet before becoming a slight uphill grade. (si.com)
I might be approaching a winding curve with a considerable uphill grade, and need to drop a gear and slow a bit. (mechanics.stackexchange.com)
Even with a full load of passengers on board, a Pilot can climb long, uphill grades without breaking a sweat. (jdpower.com)