Question

13. In examining sight distance on a horizontal curve, the sight distance is checked against potential obstruction by: (a) The road surface (b) An object on a vehicle's travel lane (c) An object on an opposite travel lane (d) An object to the side of the road. 14. The rationale for the requirement of the spiral curve to provide a minimum lateral shift in the vehicle path is to: (a) Limit the rate of centripetal acceleration to a specific value. (b) Allow vehicles to travel for a minimum of 2 seconds on the spiral curve. (c) Match driver's natural steering path as they approach a horizontal curve. (d) Provide enough distance for superelevation development. 15. Dowel bars in Portland cement concrete pavements: (a) Tie adjacent slabs across longitudinal joints. (b) Transmit load between successive slabs across transverse joints. (c) Are deformed or contain hooks. (d) Are formed into a bar mat.

Answer 1

13) d) an object to the side of the road

14) d) provide enough distance for superelevation development

15) b) transmit load between successive slabs across transverse joints.