(i)
The long- time average number of injury crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us: Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the number of fatal crashes:
Where,
Substituting the values, we have
Conclusion:
Therefore, the long- time average number of injury crashes per year at the site is
(ii)
The long-time average number of fatal crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us:
Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the number of fatal crashes:
Where,
Substituting the values, we have
Conclusion:
Therefore, the number of fatal crashes per year at the site is
(iii)
The long-time average number of property damage only crashes per year at the site.
Answer to Problem 18P
Explanation of Solution
Given:
Following information has been given to us:
Length of road segment
AADT
Total number of injury crashes for 10 years
Total number of fatal crashes for 10 years
Total number of property crashes for 10 years
Assume
The applicable safety performance functions for injury, fatal, and property damage only
crashes are:
Calculation:
We have the following formula for the long-time average number of property damage only crashes per year at the site
Where,
Substituting the values, we have
Conclusion:
Therefore,the long-time average number of property damage only crashes per year at the site
Want to see more full solutions like this?
Chapter 5 Solutions
Traffic and Highway Engineering
- The grade, g, of a road is defined as the distance it rises (or falls) to the distance it runs horizontally, usually expressed as a percentage. Consider a road with positive grade, g. Suppose that you begin driving on that road at an altitude a0. Complete parts (a) through (e). c. Apply your results in parts (a) and (b) to a road with a 5% grade and an initial altitude of 1 mile. Express your answer for the slope to four decimal places. a= + d (Round to four decimal places as needed.) d. For the road in part (c), what altitude will you reach after driving 10 miles along the road? miles (Round to three decimal places as needed.) e. For the road in part (c), how far along the road must you drive to reach an altitude of 3 miles? miles (Round to the nearest mile as needed.)arrow_forwardPlease answer the question, Final answer is Cd=104 Mpa, Ef = 104 Mpa, Ab=190Mpaarrow_forwardQuestion For an axle load of 15 tonne on a road, the Vehicle Damage Factor (round off to two decimal places), in terms of the standard axle load of 8 tonne is_ C 0.08 0.28 12.36 3.52arrow_forward
- 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, ) 0.147arrow_forwardCivil Engineering The snowmobile is traveling at 10 m/s when it leaves the embankment at A. Suppose that = 36°. Part A Part A Determine the time of flight from A to B. Express your answer to three significant figures and include the appropriate units. t R Determine the time of flight from A to B. Express your answer to three significant figures and include the appropriate units. μà Part B Value Units 5 Submit Request Answer B ? Determine the range R of the trajectory. Express your answer to three significant figures andarrow_forwardAfter observing arrivals and departures at a highway toll booth over a 60-minute time period, an observer notes that the arrival and departure rates (or service rates) are deterministic, but instead of being uniform, they change over time according to a known function. The arrival rate is given by the function, ?(?) = 2.2 + 0.17? − 0.0032?^2, and the departure rate is given by ?(?) = 1.2 + 0.07?, where t is in minutes after the beginning of the observation period and ?(?) and ?(?) are in vehicles per minute. Determine the total vehicle delay at the toll booth and the longest queue, assuming D/D/1 queuing.arrow_forward
- INSTRUCTIONS: >Solve the given problems on a bond paper as neat and as clean as possible, present complete solutions. PROBLEM: The data shown below were obtained on a highway determine the maximum flow and R-square using Greenshield's and Greenberg Model. X Y 50 18 45 25 40 41 34 58 22 71 13 88 12 99 10 105 9 110 8 124 5 132arrow_forwardUse the below data to find speed at capacity Density, k (veh/mi) x, Speed, u, (mi/h) y 53.2 48.1 44.8 40.1 37.3 35.2 34.1 27.2 20.4 17.5 146 13.1 112 8.0 Answer: 28.914 ARRICASIRENSE 115arrow_forwardTwo bumper cars at the county fair are sliding toward one another (see figure below). Initially, bumper car 1 is traveling to the east at 5.70 m/s, and bumper car 2 is traveling 78.2° south of west at 4.20 m/s. They collide and stick together, as the driver of one car reaches out and grabs hold of the other driver. The two bumper cars move off together after the collision, and friction is negligible between the cars and the ground. W-O>E Car 2 Car 1 Vii (a) If the masses of bumper cars 1 and 2 are 596 kg and 625 kg respectively, what is the velocity of the bumper cars immediately after the collision? magnitude m/s direction ° east of south (b) What is the kinetic energy lost in the collision?arrow_forward
- HIL A vehicle was stopped in 3 seconds by fully jamming the brakes. The skid marks measured 11.2 m. The average skid resistance coefficient will bearrow_forwardThe 4.2 Mg truck and 2.0 Mg car are traveling with the free- rolling velocities shown just before they collide. After the collision, the car moves with a velocity of 16 km/h to the right relative to Part A the truck. Determine the coefficient of restitution between the truck and car.(Figure 1) VO AZ 1 vec ? You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer Part B Determine the loss of energy due to the collision. VO AZ I vec ? Figure 1 of 1 ΔΕ - kJ Submit Previous Answers Request Answer 30 km/h X Incorrect; Try Again; 5 attempts remaining 10 km/h Provide Feedbackarrow_forwardThe solution of the following Differential Equation dy sec x dx = y+ sin x, is - sin x-1+ cesinx sin x+1- ce-sin z The answer is O the answer is O - sin x+1- ce*in x sin x-1+ ce sinx The Answer Is O The Answer is Oarrow_forward
- Structural Analysis (10th Edition)Civil EngineeringISBN:9780134610672Author:Russell C. HibbelerPublisher:PEARSONPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
- Fundamentals of Structural AnalysisCivil EngineeringISBN:9780073398006Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel LanningPublisher:McGraw-Hill EducationTraffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning