c) The Zambian Road Transport and Safety Agency (RTSA) has established crash reduction factors shown in the table below. CountermeasSure Reduction Factor Retime signals Provide left-turn signal phase Reduce speed limit on approaches Provide turning guide lines Prohibit left turns 0.10 0.30 0.35 0.05 0.75 An intersection has been identified as having an abnormally high left-turn crash rate (17, 20, and 18 crashes in the last three years), attributed to excessive speeds and the absence of an exclusive left-turn phase. The ADT of the intersection for the last three years is 8400, and the ADT for after implementation is 9500. Determine: i. the appropriate countermeasures and ii. the expected reduction in crashes if the countermeasures ayou have proposed are implemented.

c) The Zambian Road Transport and Safety Agency (RTSA) has established crash reduction factors shown in the table below. CountermeasSure Reduction Factor Retime signals Provide left-turn signal phase Reduce speed limit on approaches Provide turning guide lines Prohibit left turns 0.10 0.30 0.35 0.05 0.75 An intersection has been identified as having an abnormally high left-turn crash rate (17, 20, and 18 crashes in the last three years), attributed to excessive speeds and the absence of an exclusive left-turn phase. The ADT of the intersection for the last three years is 8400, and the ADT for after implementation is 9500. Determine: i. the appropriate countermeasures and ii. the expected reduction in crashes if the countermeasures ayou have proposed are implemented.

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: A 11.5-mile section of HYW77 has an ADT of 6300. There were 32 crashes in this section with four…

Q: Determine the probable speed of the car involved in the accident when the brakes were applied in…

A: The length of the skidmarks was recorded to be 40m.A test car skidded 14mThe road has a downhill…

Q: At an impaired driver checkpoint, the time required to conduct the impairment test varies…

Q: A highway has a posted speed limit of 50mph and, on one section, has both horizontal and vertical…

A: The posted speed limit = 50 mph The station of PC = 16+00 The superelevation rate = 8% The station…

Q: It is observed that 50 traffic crashes occurred on a 20-mile long section of Route 120 in one year.…

Q: • A roadway segment with two lanes of traffic was monitored for speeds over a length of 1 mile. 10…

A: number of vehicles sampled=m=10distance=d=1mileLane 1…

Q: Determine the predicted average crash frequency,

A: Annual average daily traffic: - It is defined as the annual average vehicle using a specific segment…

Q: There's an intersection of 2 roadways, the average daily traffic (ADT) values are 9,000 and 6,825.…

Q: The accident rates for 100 million vehicles miles of travel caused by people attempting to pass a…

A: solution: No.of vehicles =100 millionAccident rate,R=6.0Length of road,L=10 milesA D T=36000Crash…

Q: 1) A 6-lane two-way arterial road has a maximum flow of 6,000 vehicles per hour on one direction. It…

A: Transportation adds to the conservative, modern, social and social advancement of any country.…

Q: Data on a traffic accident record on a certain intersection for the past 4 years has an accident…

Q: Consider the problem of traffic flow on a three-lane (one direction) freeway which can be described…

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: In speed and delay study, if the average journey time on a stretch of road length of 3.5 km is 7.55…

A: Given - Road length = 3.5 km. Average journey time = 7.55 minutes Average stopped delay = 1.8…

Q: Listen Factors that contribute to collisions can be broken down into the following

A: Level of Service At the point when a street is conveying a traffic volume equivalent to its ability…

Q: u=uf It is known that the capaciry is 4200 veh/h and the jam density is 210 veh/mi. What is the…

A: u = uf1-kkj3.5 ......1 u =Space mean speed uf = Free flow speedk = Traffic densitykj = Jam density…

Q: A modern roundabout is scheduled to be installed at a location that is currently a traditional 4-leg…

A: 1. By installing roundabout at a location it helps to improve the safety which is based on safety…

Q: An expressway off-ramp consisting of a single lane leads directly to a tollbooth. The rate of…

Question

b) What are the three májor
c) The Zambian Road Transport and Safety Agency (RTSA) has established crash reduction
factors shown in the table below.
Countermeasure
Reduction Factor
0.10
Retime signals
Provide left-turn signal phase
Reduce speed limit on approaches
Provide turning guide lines
Prohibit left turns
0.30
0.35
0.05
0.75
An intersection has been identified as having an abnormally high left-turn crash rate (17, 20,
and 18 crashes in the last three years), attributed to excessive speeds and the absence of an
exclusive left-turn phase. The ADT of the intersection for the last three years is 8400, and the
ADT for after implementation is 9500. Determine:
the appropriate countermeasures and
ii. the expected reduction in crashes if the countermeasures a you have proposed
are implemented.
i.

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

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

Step 9

Step by step

Solved in 9 steps with 1 images

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

The crash rate on a heavily traveled two-lane rural highway is abnormally high. Thecorridor is 14 miles long with an ADT of 34,000. An investigation has determined thathead-on collisions are most common with an RMVMT of 4.5 and are caused by vehicles attempting to pass. Determine an appropriate countermeasure and calculate theestimated yearly reduction in total crashes.
22. An intersection had 25 reported traffic crashes during the months of January through September. The AADT for the intersection is shown. What is the crash rate per million entering vehicles 2000 8000 4000
The average daily traffic entering the España – Governor Forbes intersection is 27000. If the accident rate is 8945 per million entering the vehicles (MEV), find the total number of accidents in 4 years. a. 352 612 b. 342 612 c. 332 612 d. 322 612
When an incident occurs that causes two lanes to be closed, a three-lane highway in one direction is carrying a total volume of 4700 veh/h. Calculate the maximum queue length, total delay, number of vehicle impacted by the event and average individual delays if the highways capacity is 2550 veh/h/ln. It takes 120 minutes to clear the obstacle.
A state transportation agency want to evaluate engineering countermeasures applied to a two-lane,two-way rural highway segment.This 4 miles segment has been identified as having 14,19,and 23 total crashes in the last three years,before the implementation of the countermeasures.The AADT at the segment for last three years is 5630 vehicles per day and the AADT for after implementation is 6240 vehicles per day.Compute the expected average crash frequency for the after period, assuming the treatment was not implemented.The segment has the same conditions as the base conditions established for SPF.
Three ways to reduce traffic delays are available to you. What distinguishes one from the other?
Data obtained from aerial photography showed six vehicles on a 600 ft – long section of road. Traffic data collected at the same time indicated an average time headway of 4 sec. Determine (a) the density on the highway, (b) the flow on the road, and (c) the space mean speed.
A two-lane highway (two 12-ft lanes) has a posted speed limit of 45 mi/h and one section has both horizontal and vertical curves, as shown in the figure below. A recent daytime crash (driver traveling eastbound and striking a stationary roadway object) resulted in a fatality and a lawsuit alleging that the 45 mi/h posted speed limit is an unsafe speed for the curves in question and was a major cause of the crash. Evaluate and comment on the roadway design if superelevation and radius, as well as SSD and K (rate of curvature) values of the road was adequate in safety provisions. Use g = 32.2 ft/sec2. Use 1.47 as conversion factor from mi/h to ft/s. Formula of rate of curvature is K = L/A hint: compare values of fs, SSD, and K with allowable values listed below allowable fs for 45 mi/h at e = 7.0%: 0.15 allowable SSD for 45 mi/h = 360 ft allowable K at 45 mi/h = 79
The estimated crash rate per Million Vehicle-Miles of Travel on undivided ruralroadways with a total of 20 Driveways per mile is most nearly: A) 2.5 B) 3.5 C) 4.5 D) 5.5
Please show me the process and steps. A) Traffic on a highway is said to follow the Greenshields model with jam density of 196 pc/mi/ln. The measured capacity is 3250 pc/h/ln. What is the free flow speed?
Answer True/False to the following: 1) A strong degree of uniformity in the design of traffic facilities guarantees uniform reactions from drivers. 2) The traffic signal warrant that several agencies do not recommend using is the Peak Hour Traffic Volume warrant. 3) It is reasonable to use a higher unit extension time value on an actuated signal approaches with higher speeds. 4) According to the Roundabout Design Guide volume-to-capacity ratio of 0.85 must be the threshold for acceptable operation at a roundabout entry.
An incident occurs on a freeway that has a capacity in the north bound direction, before incident, of 4000 veh/h and a constant flow of 2900 veh/h during the morning commute (no adjustments to traffic flow result from the incident). At 8:00am, a vehicle crash closes the freeway to all traffic. At 8:12am, the freeway is partially opened with a capacity of 2000 veh/h. Finally, the crash site is removed and the freeway is restored to full capacity of 4000 veh/h at 8:31am. Assuming the traffic follows a D/D/1 queueing (FIFO queue discipline) to determine time of queue dissipation, longest queue length, total delay, average delay per vehicle, and longest wait of any vehicle.