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A section of a freeway has a speed-density relationship as following: If density < 30 veh then speed equal to the free-flow speed. hr veh If density > 30 then assuming a linear speed-density relationship, and the hr speeds and densities of the freeway are shown in the table below: Speed (mile/hr) 45 60 Density (veh/hr) 90 60 Find: 1- Free-flow speed and Jam density. 2- The space-mean speed, flow, and density at freeway capacity.

A section of a freeway has a speed-density relationship as following: If density < 30 veh then speed equal to the free-flow speed. hr veh If density > 30 then assuming a linear speed-density relationship, and the hr speeds and densities of the freeway are shown in the table below: Speed (mile/hr) 45 60 Density (veh/hr) 90 60 Find: 1- Free-flow speed and Jam density. 2- The space-mean speed, flow, and density at freeway capacity.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A section of a freeway has a speed-density relationship as following: veh If density < 30 then speed equal to the free-flow speed. hr veh If density > 30- then assuming a linear speed-density relationship, and the hr > speeds and densities of the freeway are shown in the table below: Speed (mile/hr) 45 60 Density (veh/hr) 90 60 Find: 1- Free-flow speed and Jam density. 2- The space-mean speed, flow, and density at freeway capacity. 3- The density and space-mean speed when the flow is 2250 (veh/hr).
Transcribed Image Text:A section of a freeway has a speed-density relationship as following: veh If density < 30 then speed equal to the free-flow speed. hr veh If density > 30- then assuming a linear speed-density relationship, and the hr > speeds and densities of the freeway are shown in the table below: Speed (mile/hr) 45 60 Density (veh/hr) 90 60 Find: 1- Free-flow speed and Jam density. 2- The space-mean speed, flow, and density at freeway capacity. 3- The density and space-mean speed when the flow is 2250 (veh/hr).
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