Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1,200 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were 55, 50, 45, 40, and 35 mi/h, respectively, determine the space mean speed (in km/h) for the data using the following equation where u, and u are in km/h. (Round your answer to at least three significant figures.) U = 0.966+ (3.541 km/h) km/h Determine the space mean speed (in km/h) for the data using the following equation. (Round your answer to at least three significant figures.) n i=1 km/h Compare your answers and discuss the results.

Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1,200 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were 55, 50, 45, 40, and 35 mi/h, respectively, determine the space mean speed (in km/h) for the data using the following equation where u, and u are in km/h. (Round your answer to at least three significant figures.) U = 0.966+ (3.541 km/h) km/h Determine the space mean speed (in km/h) for the data using the following equation. (Round your answer to at least three significant figures.) n i=1 km/h Compare your answers and discuss the results.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 13P

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Question

u_t

and

u_s

are in km/h. (Round your answer to at least three significant figures.)

u_t = 0.966u_s + (3.541 km/h)

km/h

Determine the space mean speed (in km/h) for the data using the following equation. (Round your answer to at least three significant figures.)

u_s =

u_i

i=1

km/h

Compare your answers and discuss the results.

Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1,200 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively.
If the speeds of the vehicles were 55, 50, 45, 40, and 35 mi/h, respectively, determine the space mean speed (in km/h) for the data using the following equation where and are in km/h. (Round your answer
to at least three significant figures.)
ū= 0.966+ (3.541 km/h)
km/h
Determine the space mean speed (in km/h) for the data using the following equation. (Round your answer to at least three significant figures.)
n
1
Ui
1=1
km/h
Compare your answers and discuss the results.

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Assume you are an observer standing at a point along a three‐lane roadway. All vehicles in lane 1 are traveling at 30 mi/hr, all vehicles in lane 2 are traveling at 45 mi/hr, and all vehicles in lane 3 are traveling at 60 mi/hr. The spacing between vehicles in each lane is 0.5 mile. If you collect spot speed data for all vehicles as they cross your observation point for 2 hours, what will be the time‐mean speed and space‐mean speed for this traffic stream?
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