14. A 50 ft. wide straight road leads into a 60 ft. radius cul-de-sac with no intermediate reverse curves (straight road is not tangent to the cul-de-sac). The total curve length of cul-de-sac excluding the part including the straight road is closest to (a) 125 (b) 225 (c) 325 (d) 425 15. The concept of offset on a horizontal curve is relative to (a) Perpendicular PC to PT (b) Perpendicular to the curve (c) Perpendicular to the long chord (d) Perpendicular to line from CC to curve