Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 3, Problem 5P
To determine
The average walking speed and compare it with the recommended walking speed in the Manualof Uniform Traffic Control Devices(MUTCD).
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Calculate the minimum passing sight distance required for a two-lane rural highway that has a posted limit of 72 kph. The local traffic engineer conducted a speed study of the subject road and found the following:
Average speed of passing vehicle= 76 kph
Average acceleration of passing vehicle= 2.3 kph/sec
Average speed of impeder vehicles= 64 kph
Show complete solution. Need ASAP. Thank you.
28 pedestrians per cycle (both directions combined) use a crosswalk to cross a 72-ft wide street. The width of the crosswalk is 11 ft. If the walking speed is 3.5 ft/s, how much τi,ps should be allocated so that the pedestrians can safely cross?
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Chapter 3 Solutions
Traffic and Highway Engineering
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- Question 1 Calculate the stopping sight distance on a highway at a descending gradient of 3% for a design speed of 100 kmph. Assume other data as per IRC recommendations. Question 2 Calculate the safe stopping distance while travelling at a speed of 80 kmph on an upward gradient of 2 percent. Make suitable assumptions.arrow_forwardThis is a three-part question. Data obtained from aerial photography showed eight vehicles on an 800 ft-long section of road. Traffic data collected at the same time indicated an average time headway of 3.7 sec. Part A. Determine the density on the highway in vehicles per mile. Part B. Determine the flow on the road in vehicles per hour. Part C. Determine the space mean speed in mph.arrow_forwardQUESTION 10 During one hour, 1800 pedestrians passed by the observation point on the pedestrian walkway. The flow appeared to be relatively consistent over the hour (i.e. PHF-0.90). The effective walkway width was 5 ft. Pedestrian were moving at roughly 4.25 ft/sec. What was the observed average spacing (ft2/ped)? Record your answer to the nearest integer.arrow_forward
- 3. An engineering student at Siliman Universty is driving on a level roadway and sees a construction sigh 600 feet ahead in the middle of the roadway. The student strikes the sign at a speed of 35 mph. If the student was traveling at 55 mph when the sign was first spotted, what was the student's associated perception/reaction time? Assume that the deceleration is 11.2 ft/s?.arrow_forwardDetermine the yellow interval that eliminates a dilemma zone for a 20-foot-long passenger car traveling at 35 mph on a level approach to an intersection that is 24 feet wide. Assume 1 second for perception-reaction time.arrow_forwardChoose the right answer Three vehicles are recorded with speeds of 80, 70, and 200 mi/h. Find average time mean speed for these three vehicles to traverse a section of 1 mile. a-80 b-70 c-60arrow_forward
- The city received a complaint of afternoon traffic speeding in a residential area. The city suspected this was related to students leaving a nearby school. The first action taken by the city was to quantify the facts by conducting a spot speed study. The city decided to use the stopwatch method because of their limited resources. The Speed (mph) 21.4 22.2 23 24 Frequency of Vehicles 3. 25 26.1 27.2 28.9 30 31.5 33.3 35.2 37.5 9. 11 13 posted speed limit is 30 mph. The study was conducted on a Wednesday and started at 3:00 p.m. The time was selected to correspond to the period when most students leave the school. The study continued until a sample size of 100 9 10 10 9. 40 42.8 vehicles was measured.arrow_forwardQuestion 48 Determine the impact factor for a highway curve having a radius of 1,600 ft and maximum design speed of 58 kph. Express your answer in 4 decimal places. A Moving to another question will save this response.arrow_forward7. Three cars travel over a 50m section of highway at constant speeds of 19, 20, and 22m/s. Compute the time mean speed and space mean speed of this condition.arrow_forward
- 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 cleararrow_forwardURGENT 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?arrow_forwardCalculate the minimum passing sight distance required for a two-lane rural roadway that has a posted speed limit of 45 mi/h. The local traffic engineer conducted a speed study of the subject road and found the following: average speed of the passing vehicle was 47 mi/h with an average acceleration of 1.43 m/h/sec, and the average speed impeder vehicles was 40 mi/h. Write your step by step solutions.arrow_forward
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