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  1. S

    Horizontal Curve?

    My apologies, The question is. Is the horizontal curve radius given always from the center-line of the inner most lane? Regardless of how many lanes
  2. S

    Horizontal Curve?

    I am working on a problem in the NCEES Transpo Exam (quest 526). The question is about min shoulder width for two lane (11ft lanes) with concrete barriers and 40mph speed limit and curve radius of 600. Is the horizontal curve radius always the center-line of the inner most lane?
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