Question

2. a) A single lane interchange exit ramp is being designed for a roadway with a design speed of 110 km/h. For a ramp design speed of 50 km/h, determine the lower and upper limits of the length of the deceleration lane (excluding taper) for a ramp with a downgrade of 3%. b) How would your answers change for an upgrade of 3%? c) How would your answers to a) and b) change for a two-lane exit ramp? c How would your answers to a), b) change for an entrance ramp acceleration lane? d) For the information in part a), what is the minimum radius of curvature for the ramp for emax 0.08. e) For the information in part a), what is the minimum sight distance to the bullnose? Compare this to the minimum stopping sight distance in Table C2-1. Comment briefly on any observed differences.

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