Answered: A trucking company places their office…

A trucking company places their office phone number on the back of all of their vehicles to receive comments on how well their employees are driving. Identify the type of sampling method used

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter4: Traffic Engineering Studies

Section: Chapter Questions

Problem 7P

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Task 1: Question 2 The parking survey data collected from a parking lot by license plate method is as shown in the table below. Find the average occupancy, average turn over, parking load, parking capacity and efficiency of the parking lot. BAY P1 P2 P3 P4 Time 50-60 00-10 10-20 20-30 30-40 40-50 A1212 Y1212 B1212 C1212 D1212 E1212 H7896 H7698 K7878 GO012 P1010 B1012 C1210 E1021 M7878 K1612 K7887 K7878 F6666 F6666 F6666 F6666 Q1 L3232 L3232 L3232 L3232 L3232 L3232 Q2 A1919 A1919 B1645 P7814 Q3636 V0001 Q3 M2756 M2756 M2756 M2756 Q4 R6015 P6015 B6015 E6015 F6015 E6015 Q5 Q6 Q6666 B1212 Q6666 B1212 Q6666 B1212 T1010
Question 2: A student safety advocacy group believes that drivers are speeding down Manhattan College Blvd. To prove their point, they wish to college vehicle speed data. Previous research has shown that the standard deviation of vehicle speeds on this functional class of roads is 7.00 mph. A. How many vehicles will the group need to sample to determine the 50 percentile speed if they wish to be 95.5% confident in their results plus or minus 3.00 mph? B. How does the 50“ percentile required sample size change if we are concerned about the 85" percentile? C. How does the 50" percentile required sample change if we want the results to be accurate to plus or minus 1.5 mph?
Select the true items related to critical gap. Select only the four correct answers. It is a gap that about ninety percent of the drivers of leading vehicles would accept. It is a gap that about fifty percent of the drivers of leading vehicles would accept. The following vehicle is the one that follows the leading vehicle and merges into the mainstream traffic without stopping. The following vehicle is the one that follows the leading vehicle but stops before merging into the mainstream traffic. The critical gap is greater than the follow-up gap. The critical gap is smaller than the follow-up gap. The leading vehicle is the one that merges into the mainstream traffic and never becomes the queue head in the minor approach. The leading vehicle is the one that stops before merging into the mainstream traffic and becomes the queue head in the minor approach.
A driver hit a pedestrian resulting in minor injuries. He was claiming that he followed the posted design speed at 80 kph (running speed368 kph) and perceived the design speed wasn't 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
Consider a case in which a detector records an occupancy of 0.200 for a 15 – minute analysis period. If the average length of a vehicle is 28 ft. and the detector is 3 ft. long, what is the density?
A highway bridge is currently scheduled to be inspected once every two years. There is a 3% probability that during an inspection a major defect will be found. Compute the probability that in the next 12 years no defects will be found in the bridge. Assume statistical independence concerning finding defects in different inspections.
Can someone please show me how to solve this step by step. Thank you Suppose you are hired by the UHM Transportation and Traffic Lab (TTL) to analyze vehicle arrivals at one lane of the interchange bridge connecting I-25 and I-40 for the period from 12:00am to 4:00am in a weekday. It is known that vehicle arrivals follow a Poisson process at this location. There is a single-loop detector embedded on this lane at the end of the interchange bridge. Since you do not want to go to the bridge to count vehicles at this time period, you decided to use the loop detector data for the analysis. Of the 720 20-second intervals (the loop detection system stores data every 20 seconds), 508 intervals were identified to have at least one vehicle detected. Assume the loop detector is free of error. Please estimate the vehicle arrival rate (vehicles per second) for this lane. With the estimated arrival rate, please calculate the probability of having three or more vehicles detected in a 20-second…
URGENT Please answer this problem in 15 minutes, need a correct answer with complete solution. Subject is Highway Engineering. Box the final answer and do not shortcut your solution. I will give an upvote if it satisfies. Thank you! A vehicle is moving on a level road at an initial speed of 40 km/h and a final speed of 0 km/h. Considering that the road is wet, what will be its stopping distance having a perception-reaction time of 3.2 seconds?
Road Safety According to accident statistics of a certain town over the last three years, the ten intersections having the highest number of accidents are shown in the table below together with the corresponding number of accidents and the total entering vehicles for each intersection. Identify the intersections that may be considered hazardous, using 95% level of confidence. Intersection No. Number of Accidents Daily Entering Vehicles 1 243 15,900 2 220 18,300 3 310 24,000 4 210 13,600 5 239 14,200 6 250 17,120 7 188 13,700 8 360 19,300 9 350 47,900 10 370 17,100
H.W: The average number of collisions occurring in a week during the summer months at a particular intersection is 2.00. Assume that the requirements of the Poisson distribution are satisfied. 62 Engineering Suatitics Dr. Tarig Hussein 1 Year a) What is the probability of no collisions in any particular week? b) What is the probability that there will be exactly one collision in a week? ) What is the probability of exactly two collisions in a week? d) What is the probability of finding not more than two collisions in a week? ) What s the probability of finding more than two collisions in a week? ) What is the probability of exactly two collisions in a particular two-weck interval? Ans. a) 0.135,b) 0.271, ¢) 0.271, d) 0.677, €) 0.323, ) 0.147
A researcher was observing traffic along one lane of a rural highway. During a 1 minute time interval, ten vehicles were observed travelling 65, 64, 71, 66, 58, 72, 69, 66, 55 and 62 mph. Using these spot speeds, calculate the space mean speed (mph). Provide your answer to the nearest tenth of a mph.
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