Given: deflection angle A 1644'; PI @ 11+66.18; and 24ft road width and 2 lanes; Design Speed (V=40mph); Degree of curvature D=8 Required: All relevant information for layout purposes, including key stations and deflection angles. Compute at 50 ft interval stations. Caiculation of Defiection angles for Spiral Curves Deflection Deflection Distance from TS (or ST) Angle minutes angle converted to Degrees Station e'x60 L te'160) l(t or m) TS SC Circular Curve data: Deflection angle (calculation procedure as previously illustrated for circular curves) A = 12'15') ST COMPUTING RELEYANT STATIONS FOr LAYOUUT KEY STATIONS PI STA. Ts TS. STA. + Ls S.C.STA. + Lc. C5.STA. +Ls S.T. STA.