An approach at a signalized intersection with a 75-second cycle gets 26.25 seconds of displayed green time. Yellow time is 4 seconds and all-red is 2 seconds (lost time is to be determined from standard assumptions). At the beginning of an effective red there are 9 vehicles in the queue and the saturation flow is 867 veh/h. The arrival rate is given by v(t) = 0.18 - 0.0011 (with v(t) in veh/s and t in seconds after the beginning of the effective red). What is the average vehicle delay for this approach in seconds at the end of the cycle (until the next effective red) that started with the 9 vehicles queued at the beginning of the effective red? (Assume D/D/1 queueing. Please provide you answer in decimal form without units)

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Introduction to Engineering Design

Students are often confused with engineering and design. The term engineering design has two words with different meanings, engineering, and design. The term engineering implies applications of laws and principles of science to design and analyze physical structures and components. In civil engineering, students apply the concept of physics and chemistry to design and build structures and buildings. In engineering disciplines, the term design means determining the dimensions, loads, and associated influences on the component due to the applied loads such as stresses and deformations. The estimation of such parameters is crucial to make the component or structure foolproof.