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No 3DividerSand Buff
No 4DividerTree Green
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1-way roads 3-lane highways acceleration added lane adjacent alinement angle assumed design speed bridge central island clearance construction cross slope crossroad curbs curvature deceleration lanes design truck desirable direct connections direct left turns directional islands divided highway drivers edge of pavement entering exit curve Feet Feet Feet grade separation gradients hazard high speed inner loop interchange interchange roads intersecting roads Intersections at Grade left-turning movements located major road median strip miles per hour minimum sight distance necessary operation opposing traffic outer connection overcrossing passenger vehicles passing paths pedestrians percent preference road quadrants radial roads radii radius ramp design ramp terminals reduce reverse curve right turns right-of-way rotary design rotary intersections rotary roadway separate turning lanes shown in figure sidewalks speed-change lanes structure superelevation surface tangent taper traffic density traffic lanes turning left turning movements turning traffic U-turns undercrossing upper widened width of median