Answered: what will be the time-mean speed and…

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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Imagine you are recording speed at a point along a three-laneroadway. All vehicles in lane 1 are traveling at 60 mi/h, all vehicles in lane 2 are traveling at 30 mi/h, and all vehicles in lane 3 are traveling at 45 mi/h. There is also a constant spacing of 3168 ft. between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 60 minutes, what will be the time-mean speed and space mean speed for this traffic stream?

Expert Solution

Given data:

The values given in the question are as follows

Travelling speed of lane-1 vehicles( $v_{1}$ )=60 mi/hr

Travelling speed of lane-2 vehicles( $v_{2}$ )=30 mi/hr

Travelling speed of lane-3 vehicles( $v_{3}$ )=45 mi/hr

Constant spacing(S)=3168 ft or 0.6 mile

Observed travel time(t)=60 minutes or 1 hr

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