2) A 6-lane divided highway has a design speed of 65 mph and the following typical section: Grassed median: Median shoulders: Lanes: 14 ft. wide 4ft. wide 12 ft. wide, 3 lanes directional Right-side shoulders: 10 ft. wide Centerline Degree of Curvature, D is 3° 45' If single face concrete barrier be installed along the highway without encroaching on the required horizontal sight distance, how far (at minimum) from the roadway centerline should the face of the barrier be located?