What is lowest grade possible for the constant-grade section

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A tangent section of highway has a -1.0% grade and ends at station 0+1450and elevation 25m. It must be connected to another section of highway that has a -1% grade and that begins at station 1+345 and elevation 40m. The connecting alignment should consist of a sag curve, and be designed for a speed of 80km/h. What is the lowest grade possible for the constant-grade section that will complete this alignment?

Reference no: EM13304063

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