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### 4. Stationing

Referring to Figure E-7, curve endpoint stations are determined using Equations E-11 through E-15.

Equation E-11 | |

Equation E-12 | |

Equation E-13 | |

Equation E-14 | |

Equation E-15 |

As with a regular horizontal curve, a station equation exists at the point where the curve system exits onto the tangent at the ST.