_____________ curves are curves which, when viewed from the side, are concave upwards. This includes vertical curves at valley bottoms, but it also includes locations where an uphill grade becomes steeper, or a downhill grade becomes less steep.
A. Sag horizontal
B. Hog horizontal
C. Sag vertical
D. Hog vertical
Answer:C
_____________ curves are curves which, when viewed from the side, are concave upwards. This includes vertical curves at valley bottoms, but it also includes locations where an uphill grade becomes steeper, or a downhill grade becomes less steep.
A. Sag horizontal B. Hog horizontal C. Sag vertical D. Hog vertical