You've been asked to design a vertical curve for an expressway that joins a +4% grade with a -2% grade. The design speed for this expressway is 50 mi/h, the perception- reaction time t = 2.5 sec, and the deceleration rate for braking a = 11.2 ft/sec2. What is the minimum length of curve for this section if SSD

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The Profession of Transportation

Transportation Engineering or Transport Engineering is the application of innovation and research-based fundamentals to the planning, management, and operations of facilities for any means of transportation for the provision of safety, efficiency, convenience, security, that is economically and environmentally suitable for the motion of people and goods transportation to various places.