A traffic pacing operation was conducted by a highway patrol unit (see FigureQ2(a)) to slow down upstream traffic on a highway due to maintenance worksbeing conducted downstream. The speed of the highway patrol unit duringthis operation was 40 km/h and the upstream traffic density was 150vehicles/km. After passing the location of the maintenance works, thehighway patrol unit left the traffic stream, causing traffic speed to increase to70 km/h and density to settle at 50 vehicles/km.(i)Develop a mathematical relationship between speed and density.(ii)Will the upstream traffic flow reach the maximum flow? Upstream trafficHighway Patrol UnitFigure Q2(a): Traffic pacing operationon ahighway....

Due to maintenance work Speed of highway petrol unit = 40 km/hr Upstream traffic density = 150…

A traffic pacing operation was conducted by a highway patrol unit (see Figure Q2(a)) to slow down upstream traffic on a highway due to maintenance works being conducted downstream. The speed of the highway patrol unit during

A traffic pacing operation was conducted by a highway patrol unit (see Figure Q2(a)) to slow down upstream traffic on a highway due to maintenance works being conducted downstream. The speed of the highway patrol unit during

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: An engineer wishing to obtain the speed characteristics on a bypass around her city at a confidence…

A: speed is the dimensions of distance divided by time.Bypass is a highway which helpful to reduce the…

Q: In order to examine whether installing a traffic signal is justified for an urban intersection shown…

A: A traffic light is utilized as a teaching gadget that shows the street client to act as indicated by…

Q: Question 1 Calculate the stopping sight distance on a highway at a descending gradient of 3% for a…

Q: Determine the ADT of this month? Assume total daily volume = average daily %3D volume.

A: Given data : HEF( Hourly expansion factor) = 18 POV (for particular hour)= 650 veh/h Total weekly…

Q: A data collection study found a linear speed - density relationship for a highway as follows u/65…

A: Speed: In terms of traffic, speed is defined as the distance covered per unit of time. If speed is…

Q: Traffic flow on a section of a 2 lane road can be described by the Greenshields model with a mean…

A: u2 = Speed of truck= 20 kphL = Length of travel = 6.60 km kj = Jam density = 95 veh/km/laneuf = Mean…

Q: Speed data collected on an urban roadway yielded a standard deviation in speeds of 4.8 mi/h. (a) If…

Q: If site circumstances had forced us to use the following data for a curved path highway: Will any…

Q: speeds of the shock waves created by the operation of the school zone number of vehicles affected by…

Q: Determine the density (in veh/mi) of a traffic stream comprised mainly of passenger cars, for which…

Q: Question A linear relationship is observed between speed and density on a certain section of a…

A: Given- Linear relation between speed and density, Free flow speed V=80 kmph, Jam density k=100…

Q: .) A study of freeway flow at a particular site has resulted in a calibrated speed- density…

A: NOTE: AS per guidelines I am solving question first repost the 2nd question The speed density…

Q: Gap Study Data Summary Form (observed range Did the gaps in the traffic stream appear to be random?…

A: Transportation engineering is a discipline of civil engineering that deals with transportation…

Q: An old divided 6-lane (3 lanes each direction) highway has 11 ft lanes and obstructions leaving no…

A: Freeway: Freeway is a roadway without any disturbing factors such as intersections on a roadway or…

Q: Studies have shown that the traffic flow on a two-lane road adjacent to aschool can be described by…

A: Given data The free flow speed is 57 mph, starting speed is 25 mph. The length of school zone is 0.5…

Q: A turning movement count and a saturation flow study were conducted at a major intersection on an…

A: 1. Yellow light = 3 secsred light = 2 secsIntergreen period = 3 + 2 = 5 secs.Let lost time per phase…

Q: ing characteristics and carries condition, determine the tota

A: Number of Lanes = 4Shutted down lanes = 2 Volume of traffic = 4250 veh/hrTime to clear obstruction =…

Q: Q1 Fill in the blanks: 1. When the roadway capacity = 1000 pcu/hr and demand = 1500 pcu/hr, the…

A: 1. Volume when roadway capacity is limited and demand exceeds capacity:Understanding the Concept:…

Q: Traffic flow on a section of a two-lane highway can be described by the Greenshields model, with a…

A: Step 1:given data:- mean free speed (Vsf) = 56 (mi/h)mean free speed (Vsf) = 90.123 Km/hjam density…

Q: Q.48 An observer vehicle travelling along the traffic stream on a 3 kilometer stretch is passed by…

A: given-3 km traffic stretch30 vehicles meets 240 vehiclesspeed of observer=60 kmph

Q: An accident occurs on a one-lane highway and blocks off all lanes of traffic. This freeway has a jam…

Q: Determine the stopping sight distance (SSD) when a vehicle is traveling at 50 mph on a road with G =…

A: Given:- vehicle is traveling at 50 mph on a road with G= 5.5% downgrade. To find:- stopping sight…

Q: What are the three different project models for carrying out construction work?

A: Three different types of project models for carrying out construction work are as follows :- EPC…

Q: The following data was collected from a lane when the highway was operating at capacity. Spot…

A: As per the terms and conditions of the Bartleby we are supposed to answer only 3 subparts, please…

Q: A flow characteristic that is related to the density and obtained from speed data is occupancy. Data…

A: Given , Occupancy = 9.375% = 0.09375 Detector d = 6 Ft Mean vehicle…

Q: Data obtained from aerial photography showed nine vehicles on a 720 ft-long section of road. Traffic…

Q: Determine the stopping sight distance (SSD) when a vehicle is traveling at 50 mph on a road with G…

Q: What is the difference between one-way slab and two-way slab?

A: In construction the slab is an extremely used structural element forming floors and roofs and also…

Q: Q2: If site circumstances had forced us to use the following data for a curved path highway: Will…

Q: 6-5 The data shown below were obtained on a highway. Use regression analysis to fit these data to…

Q: The capacity of a highway is suddenly reduced to 60% of its normal capacity due to closure of…

A: Given: Reduction in the capacity of the highway = 60% Jam density of the highway kj= 112 veh/mi Mean…

Q: Road accident 'black spots' are locations that attract more accidents by comparison with other…

Q: For a specific rural road segment in northeast Colorado, the total number of crashes as well as the…

A: Standard deviation = 55+5+1003 + 3+8+13+1.3+0.02+0.0333 = 58 Now,…

Q: data according to green shield model then determine 1. Time mean speed. 2. Jam density. 3. Capacity…

Q: For a spot speed study in which 100 observations were obtained, the mean speed was 52 km/h and the…

A: Given data:

Q: was claiming that he followed the posted design speed at 80 kph (running speed%-68 kph) and…

A: use ssd formula

Q: what is the estimated space-mean speed of these vehicles?

Question

A traffic pacing operation was conducted by a highway patrol unit (see Figure
Q2(a)) to slow down upstream traffic on a highway due to maintenance works
being conducted downstream. The speed of the highway patrol unit during
this operation was 40 km/h and the upstream traffic density was 150
vehicles/km. After passing the location of the maintenance works, the
highway patrol unit left the traffic stream, causing traffic speed to increase to
70 km/h and density to settle at 50 vehicles/km.
(i)
Develop a mathematical relationship between speed and density.
(ii)
Will the upstream traffic flow reach the maximum flow?

Upstream traffic
Highway Patrol Unit
Figure Q2(a): Traffic pacing operation
on a
highway
....

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1 Given Data

VIEW

Step 2 Mathematical relationship between speed and density

VIEW

Step 3 Will upstream traffic flow reaches maximum flow

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

Using Greenshields' model, for a highway with a mean free flow speed of 76 mi/h and jam density of 128 veh/mi, determine the density (in veh/mi) when the mean speed is observed to be 58 mi/h: 30.3 35.3 41.1 58 None of the above
The contractor would like to increase the shore spacing to allow more clearance for access below the formwork. What are three changes in the design of the formwork (not changes in the concrete or the construction live loading) that could be made to accommodate the increase in spacing. No calculations needed. Just list the formwork design changes.
An engineer, wishing to determine the travel time and average speed along a sectionof an urban highway as part of an annual trend analysis on traffic operations, conducteda travel time study using the floating-car technique. He carried out 10 runs andobtained a standard deviation of ±3 mi/h in the speeds obtained. If a 5% significancelevel is assumed, is the number of test runs adequate?
QUESTION 7 An old divided 6-lane (3 lanes each direction) highway has 11 ft lanes and obstructions leaving no more than 2 ft of clearance on each side of the roadway. There are no driveways or intersections on the segment of interest. Given a posted speed limit of 50 mph, estimate the FFS (mph) for the 3 northbound lanes? Provide the answer to the nearest tenths.
Plz help and show proper notation
Data obtained from aerial photography showed six vehicles on a 180m long section of road. Traffic data collected at the same time indicated an average time headway of 4 sec. Determine a)density on the highway b)flow on the road c)space mean speed
A driver hit a pedestrian resulting in minor injuries. He was claiming that he followed the posted design speed at 80 kph (running speed=68 kph) and thought the design speed was not correct. Investigate the engineer's claim. (Prove by computation) a.) Was the driver's claim correct? b.) If yes, what should be the posted design speed? If not, what might be the other reasons for the pedestrian accident? Accident Report: - Driver was able to see the pedestrian 80 m ahead - Coefficient of friction = 0.4 Grade of the highway is zero - Time of accident: 8 AM - Weather condition: Fair - skid marks were not clear
A freeway traffic stream was observed to have a density of 22.0 veh/mi/ln when the mean speed was 55.0 mi/h. On another occasion at the same location, the jam density was found to be 132 veh/mi/ln. Assume Greenshields' model of traffic flow applies. The flow rate (in veh/h/ln) at the time when the mean speed was 55.0 mi/h is: 990 1210 1540 2178 None of the above
Problem.
4-4 An engineer wishing to obtain the speed characteristics on a bypass around her city at a confidence level of 95%, and an acceptable limit of ± 1.0 mi/h collected a total of 130 spot speed samples and determined that the variance is 25 (mi/h)². Has the engi- neer met with all of the requirements of the study?
Hello, can I get the answer for this question?
3. If 5473 vehicles passes a certain lane of road with an average speed of 60 kph, determine the appropriate spacing of the vehicles