## Widening and Superelevation of Roadway Curves: A Field Book for Highway Engineers |

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### Contents

page | 1 |

Application of Inside Spiral Formula Case No 1 | 18 |

Figure No 6 for Example No 2 | 25 |

Copyright | |

1 other sections not shown

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### Common terms and phrases

20-degree curve Angle Station Grade center line curve circular curve Curve D. M. S. curve whose central D. M. S. Feet Feet deflection angles degree curve Degree of Curve Degree Radii Angle Degree-of-curve easement Equation EZ.Z Factor for offset Feet D. M. S. Feet Feet Feet 1.0 Feet Feet Feet Feet Feet Sq foot roadway FUNCTIONS Degree Angle FUNCTIONS Degree Offsets FUNCTIONS Degree Radii G5 to G6 grade chord Grade Spiral Spiral grade transit line inside spiral functions intersection angle maximum superelevation maximum widening Numbers offset circle Offsets Outside Widening OO.E wo Z6I OO.T osculating circle OT.O ZE.O ZZ.O Radii Angle Station radius right-of-way roadway center line semi-tangent spiral angle spiral area spiral at spiral spiral central angle SPIRAL FUNCTIONS Degree spiral length spiral offset spiral point spiral station chord spiral tangent Station Grade Spiral superelevation at S.S. Superelevation factor Table XX Tables XVI TZ.ZI widening offsets XXII-A ZZ.O wo 9Z.T