(a)
Average unit cost for operating a standard vehicle on a level roadway.
Answer to Problem 7P
Explanation of Solution
Calculation:
The average unit cost for operating a standard vehicle on a level roadway is as follows:
Let the depreciation cost per mile as
Let the registration and insurance cost per mile as
Let the maintenance cost per mile as
Let the fuel cost per mile as
The total cost required per mile by adding all the costs.
Total cost required per mile
Total cost required per mile
Conclusion:
Therefore, the average cost required for operating a standard vehicle on a level roadway is
(b)
Average unit cost for travel time for a truck.
Answer to Problem 7P
Explanation of Solution
Calculation:
The average unit cost for travel time for a truck.
Let the cost required per mile to operate the truck as
For the total unit costs using the relation
Substituting the values, we get
Substitute the value of
Let the average speed be
Substitute
Conclusion:
Therefore, the estimate average unit cost for travel time for a truck is
(c)
Average unit cost for single-vehicle property damage.
Answer to Problem 7P
Explanation of Solution
Calculation:
The average unit cost for single-vehicle property damage.
Substituting the values, we have
Conclusion:
Therefore, the average unit cost forsingle-vehicle property damage is
(d)
Average unit cost for personal injury.
Answer to Problem 7P
Explanation of Solution
Calculation:
The average unit cost for personal injury.
Let the cost for X-ray be equal to
Let the cost for emergency to be equal to
Conclusion:
Therefore, the average unit cost for personal injury is
(e)
The average unit cost for fatality.
Answer to Problem 7P
Explanation of Solution
Calculation:
The average unit cost for fatality.
It varies from $100,000 to $4.5 million.
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Chapter 13 Solutions
Traffic And Highway Engineering
- A gravity retaining wall is shown in the figure below. Calculate the factor of safety with respect to overturning and sliding, given the following data: Wall dimensions: H = 6 m, x1 = 0.6 m, x2 = 2 m, x3 = 2m, x4 0.5 m, x5 = 0.75 m, x6 = 0.8 m, D= 1.5 m Soil properties: 71 = 15.5 kN/m³, ₁ = 32°, Y2 = 18 kN/m³, 2=22°, c₂ = 40 kN/m² H x6 X2 TXT X3 Use Coulomb's active earth pressure in your calculation and let ' = 2/3 01. Use Yconcrete = 23.58 kN/m³. Also, use k₁ = k₂ = 2/3 and P = 0 in equation FS (sliding) (ΣV) tan(k₁₂2) + Bk2c + Pp Pa cos a For 1 = 32°, a = 0°, B = 71.57°, Ka = 0.45, 8' = 21.33°. (Enter your answers to three significant figures.) FS (overturning) FS (sliding) =arrow_forwardFor the cantilever retaining wall shown in the figure below, let the following data be given: Wall dimensions: H = 6.5 m, x1 = 0.3 m, x2 = 0.6 m, x3 = 0.8 m, x4 2 m, x5 = 0.8 m, D= 1.5 m, a = 0° Soil properties: 71 = 17.08 kN/m³, ₁ = 36°, Y2 = 19.65 kN/m³, 2 = 15°, c₂ = 30 kN/m² For 2=15°: N = 10.98; N₁ = 3.94; N₁ = 2.65. x2 .. c₁ = 0 Φί H x5 Calculate the factor of safety with respect to overturning, sliding, and bearing capacity. Use Yconcrete = 24.58 kN/m³. Also, use k₁ = k2 = 2/3 and P₂ = 0 in equation (EV) tan(k102) + Bk2c₂ + Pp FS (sliding) Pa cos a (Enter your answers to three significant figures.) FS (overturning) FS (sliding) FS (bearing) = = =arrow_forwardA) # of Disinfection Clearwells: 3 B) Clearwell Operation Style: Parallel (to provide contact time for disinfection using free chlorine (derived from a hypochlorite solution generated onsite). C) The facility's existing system to generate hypochlorite onsite has reached the end of its useful life, and the current operating capacity is insufficient to generate the required mass flow of hypochlorite to accommodate the future capacity of 34.5 MGD. Assume the facility plans to stop generating hypochlorite onsite and will instead purchase a bulk solution of sodium hypochlorite D) Sodium hypochlorite (NaOCI) concentration: 6.25% NaOCI by mass E) Bulk Density: 1,100 kg/m^3 F) Clearwell T10/DT Ratio: (CW1 0.43). (CW2 = 0.51), (CW3 = 0.58) DT is the theoretical mean hydraulic retention time (V/Q) G) pH: 7.0 H) Design Temperature: 15°C 1) 50% of Chlorine is lost in each clearwell J) If the concentration going into the clearwell is C, then you can assume that the concentration leaving the…arrow_forward
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- At a point on the surface of a generator shaft the stresses are σx = -55MPa, σy = 25MPa and Txy = -20MPa as shown in Figure Q1. (a) Using either analytical method or Mohr's circle determine the following: Stresses acting on an element inclined at an angle 0 = 35°, i. ii. iii. The maximum shear stress The principal stresses and B. 25 MPa A 55 MPa 20 MPa Figure 1:Material stress state (b) Consider that the Young's modulus for the material, E = 200kPa and Poisson's ratio, v = 0.25. i. ii. determine associate strains for the material with the stress as shown in Figure 1 determine associate strains for the material with the stress at element oriented at 35° (question 1a(i))arrow_forwardA study reports data on the effects of the drug tamoxifen on change in the level of cortisol-binding globulin (CBG) of patients during treatment. With age = x and ACBG = y, summary values are n = 26, Σx, = 1612, Σ(x, - x)² = 3756.96, Σy, = 281.9, Σ(y, - y)² = 465.34, and Ex,y,= 16,745. (a) Compute a 90% CI for the true correlation coefficient p. (Round your answers to four decimal places.) (b) Test Hop=-0.5 versus H: p< -0.5 at level 0.05. Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. ◇ Reject Ho. There is no evidence that p < -0.5. ○ Fail to reject Ho. There is evidence that p < -0.5. Reject Ho. There is evidence that p < -0.5. Fail to reject Ho. There is no evidence that p < -0.5. (c) In a regression analysis of y on x, what proportion of variation in change of cortisol-binding globulin level could be explained by variation in…arrow_forwardFor the frame and loading shown, determine the reactions at A and C. 24 Last 2 student ID+50 lbs 24 A 3 in. B A=Last 2 student ID+10 Inch B=Last 2 student ID+40 Inch A B Darrow_forward
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Solid Waste EngineeringCivil EngineeringISBN:9781305635203Author:Worrell, William A.Publisher:Cengage Learning,