CE 3302_HOMEWORK 5 DUE DATE: MARCH 23, 2021 1

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CE 3302_HOMEWORK 5 DUE DATE: MARCH 23, 2021 1. The speed flow relationship for a lane in Arlington is believed to be q=300*u-70*u*ln(u), where u is the speed in mph and q is the flow rate in vph. Find (5+5+5+5) a. The free flow speed b. The maximum flow speed c. The maximum flow rate d. The density at maximum flow 2. A single lane of a freeway with a free flow speed of 80 mph has a capacity of 2600 passenger car per hour per lane. There is a flow of 880 passenger cars per hour per lane. Find jam density, the current average speed and density. Use Greenshields’s model. (5+5+5) 3. Traffic data for Interstate -30 is given in the following table Time Period 1 2 3 4 5 6 7 8 9 10 q (vph) 1650 1600 1400 1420 1600 1800 1450 1430 1420 1610 u (mph) 42 46 49 47 43 41 47 49 54 39 Occupancy (%) 12 10 9 9 10 11 9 8 10 11 Time Period 11 12 13 14 15 16 17 18 19 20 q (vph) 670 1605 900 1250 770 1425 1250 1280 2110 2070 u (mph) 53 45 50 49 55 46 48 49 38 38 Occupancy (%) 3 10 6 9 4 9 9 7 16 14 Time Period 21 22 23 24 25 26 27 28 29 30 q (vph) 1080 1240 1090 1245 735 1230 1070 250 1610 1640 u (mph) 51 47 50 46 55 48 49 54 45 44 Occupancy (%) 7 7 6 8 4 7 7 11 11 12 a. Convert these data into a scatter plot showing the relationship between speed and density. (Hint: when needed use equation 5.14 to derive density from other data in a time period). Fit a linear function (equation 5.15) to the data. Show the linear function on the scatter plot and determine the values for free-flow speed and jam density. Is the scatter plot consistent with the smooth curve? Explain. (5+5+5+5) b. Show a flow and density relationship from the data given. Use equation 5.16 with the parameters found in part a to generate a smooth curve and show this on the scatter plot. Show a manual calculation for q when k = 30 vpm. (5+5) c. Get a scatter plot for Speed and flow. Use equation 5.22 with the parameters found in part a to generate a smooth curve and show this on scatter plot. (5+5) 4. An engineer has the following data for a highway segment u (mph) 70 65 58 53 47 42 k (veh/mi) 15 34 47 62 78 89 a. b. c. d. 44 94 38 103 32 109 29 134 Applying Greenshields’ assumptions, estimate the mean free speed and jam density. What are the maximum flow and the corresponding density? What are average headway and spacing when k=50veh/mi Assume each speed is an individual vehicle, traveling over a ½ mile segment. Calculate i. Time mean speed ii. Space mean speed 20 153 (5) (5) (5) (5) (5) CE 3302 HW#7 Due April 6, 2021 1. LOS determination: The three NB lanes on an existing 6-lane level urban freeway have a peak hour volume of 3100 vehicles. One particular 6-mile section of the freeway has 4 cloverleaf interchanges, 10 foot lane widths, a right hand shoulder of 3 feet, and a peak hour factor of 0.96. The highway has a posted speed limit of 70 mph speed limit. 6% of the peak hour traffic is heavy trucks (TT) and 4% is buses/SUTs. a. What is the free-flow speed (FFS) for this freeway section? b. What is the freeway’s LOS during the peak hour? c. What is the freeway speed? 2. A new suburban freeway, cutting through the rolling hills of a fast-growing section west of Memphis, is being planned. The forecasted peak-period traffic for 20 years from now is 4400 vph in each direction. How many lanes in each direction will be required if LOS C is to be maintained? The future peak-period traffic mix is expected to be 8% trucks/buses (50% SUT/50% TT mix), and their speeds will likely be impacted by the terrain. Other important factors are: a. PHF=0.89 b. 1 diamond interchange every mile c. Current ROW is 100 feet, and a 10’ median must be provided. 3. In order to prepare for the future, the department of transportation wants to determine: a) the current LOS for a six-lane freeway and b) when it may reach capacity during poor weather conditions. Important Data: • Current volume of 4,471 vph • poor weather – CAF= 0.97 • 1 mi., 3.75 % grade • 7% trucks (30% SUT/70% TT mix) • FFS = 60 mph (measured) • Traffic growth = 3% (use a compounding growth formula) 4. TxDOT is working on the design of I-69 north of Victoria. They project a demand volume of 52,000 vehicles per day with a K factor of 0.12 and a directional distribution of 56/44 in level terrain with a target LOS of B and 17% trucks and buses. They plan to have roughly one diamond interchange every 2 miles. What number of lanes is required to achieve these design requirements? What LOS would occur for a typical 4-lane rural interstate design? DHV = AADT * K * D DHV – design hourly volume AADT – average annual daily traffic K – peak hour adjustment factor D – directional distribution (make design conservative) CE 3343 – Soil Mechanics Midterm 2 – Spring 2021 Name: Course: Soil Mechanics Exam: Midterm 2 Date: April 29, 2021 Time: 7:30 am – 9:30 am Notes: - Read all the problems carefully and always review your answers. - Assume any missing data or information. However, all assumptions have to be clearly stated and referenced or logically justified. - Partial credit will be given for the answers. University of Texas, Arlington Department of Civil Engineering 1 CE 3343 – Soil Mechanics Midterm 2 – Spring 2021 Problem 1: 25 Points For the problem as shown in Figure 1: Assume L = 30 m, H= 20 m, ht = 10 m, D = 3 m, γsat = 21.6 kN/m3, and points a, b, c, d, and, e are 7.5 m apart. Please Calculate: The uplift pressure at points a, b, c, d and e. Figure 1 University of Texas, Arlington Department of Civil Engineering 2 CE 3343 – Soil Mechanics University of Texas, Arlington Department of Civil Engineering Midterm 2 – Spring 2021 3 CE 3343 – Soil Mechanics Midterm 2 – Spring 2021 Problem 2: (20 Points) Determine the stress increase due to the embankment load at point A as shown in Figure 2. The unit weight of the embankment fill is 115 pcf. Figure 2 University of Texas, Arlington Department of Civil Engineering 4 CE 3343 – Soil Mechanics Midterm 2 – Spring 2021 Problem 3 (40 Points) Three uniformly distributed loads of 100 kPa each are applied to 10 x 10 m square areas on the soil profile shown in Figure 3. Consolidation tests prior to construction indicated that average compression index Cc is 0.50, swelling index is 0.05 and initial void ratio eo is 1.05. Assume, the soil is normally consolidated. (1) Estimate the total consolidation settlement for the clay layer only under the center of the middle loaded area. (2) Estimate settlement after 1 year if average value of cv is 0.003 cm2/sec. University of Texas, Arlington Department of Civil Engineering 5 CE 3343 – Soil Mechanics University of Texas, Arlington Department of Civil Engineering Midterm 2 – Spring 2021 6 CE 3343 – Soil Mechanics Midterm 2 – Spring 2021 Problem 4 (15 points) A clay specimen, 25 mm thick, has been tested in an oedometer apparatus with two-way drainage, and it is observed that 50% of the consolidation settlement occurs in 1 hour. A layer of the same clay is observed to settle 10 mm in 10 years and after many years to settle (total primary consolidation) by 35 mm. Determine the thickness of the clay layer if it drains only from upper surface. University of Texas, Arlington Department of Civil Engineering 7 CE 3343 – Soil Mechanics Midterm Exam I – Spring 2021 Name: Date: March 11, 2021 Time: 7:45 am – 9:20 am Notes: - Read all the problems carefully and always review your answers. - Assume any missing data or information. However, all assumptions have to be clearly stated and referenced or logically justified. - Partial credit will be given for the answers. CE3343 Problem No 1a 1b 2 3a 3b 3c 3d 3e Total Points 10 15 25 10 10 10 10 10 Problem 1: The University of Texas at Arlington Department of Civil Engineering CE 3343 – Soil Mechanics Midterm Exam I – Spring 2021 a) A strata of clean sand located below the ground water table has a moisture content of 25.6%. The minimum and maximum void ratios for this soil are 0.380 and 1.109. The specific gravity for this soil, G s = 2.70. Compute the relative density of this soil. b) The unit weight of a soil is 16.9 kN /m3. The moisture content of this soil is 17% when degree of saturation is 60%. Determine: saturated unit weight, void ratio, and specific gravity of soils. The University of Texas at Arlington Department of Civil Engineering CE 3343 – Soil Mechanics The University of Texas at Arlington Department of Civil Engineering Midterm Exam I – Spring 2021 CE 3343 – Soil Mechanics Midterm Exam I – Spring 2021 Problem 2: Based on following information, determine USCS classification for Soils C and D. Soil Type. C D The University of Texas at Arlington Department of Civil Engineering LL 30 60 PL 25 33 CE 3343 – Soil Mechanics The University of Texas at Arlington Department of Civil Engineering Midterm Exam I – Spring 2021 CE 3343 – Soil Mechanics Midterm Exam I – Spring 2021 Problem 3: A proposed grading plan requires 223,120 m3 of cut and 206,670 m3 of fill. Laboratory tests on a series of undisturbed samples from cut area produced the following results: Sample No. Dry Unit Weight (kN/m3) 17.3 17.7 16.8 17.1 16.0 1 2 3 4 5 Moisture Content (%) 9.1 9.5 8.9 7.2 12.0 A Proctor compaction test result on a representative bulk sample produced a maximum dry unit weight of 19.2 kN /m3 and an optimum moisture content of 10.2%. The project specifications require a relative compaction of at least 90%. The specific gravity for this soil, Gs = 2.65. Dry Unit Weight (kN/m3) 20 19 18 17 16 15 0 5 10 15 20 Moisture Content (%) Proctor Test Results a) Determine the shrinkage factor and required volume of import or export soils, if any. Use dry unit weight of cut, when computing any import or export quantities. The University of Texas at Arlington Department of Civil Engineering CE 3343 – Soil Mechanics Midterm Exam I – Spring 2021 b) Determine the weight any import or export soil, assuming it moisture content equal to average moisture content in the cut. Express your answers in metric tons (1 metric ton = 1000 kg). c) Determine the degree of saturation of the compacted fill soil? Calculate the quantity of water required to bring the compacted soil to 100 % saturation. d) Field compaction tests were performed to determine the actual filed density of compacted soils. Test results are as follows: Relative Compaction (RC) = 85%, moisture content = 16.5% But the project specified that the required RC should be 90%. The site engineer recommended to add more water to increase the RC to 90%. Do you agree with the site engineer? Explain your answer. e) After addition of more water, a second test was performed to verify new field density. Test results are follows: Relative Compaction = 98%, moisture content = 14.9% Check the validity of the test results. The University of Texas at Arlington Department of Civil Engineering CE 3343 – Soil Mechanics The University of Texas at Arlington Department of Civil Engineering Midterm Exam I – Spring 2021 CE 3343 – Soil Mechanics Final Exam – Spring 2021 Name: Course: Soil Mechanics Exam: Final Exam Date: May 11, 2021 Time: 8:00 am – 10:30 am Notes: - Read all the problems carefully and always review your answers. Assume any missing data or information. However, all assumptions have to be clearly stated and referenced or logically justified. Partial credit will be given for the answers. CE3343 Problem No 1 2 3 4 Total Points 25 35 25 15 CE 3343 – Soil Mechanics Final Exam – Spring 2021 Problem 1 Twelve undisturbed soil samples were obtained from borings in a proposed cut area. Theses samples have an average γd of 108 lb/ft3 and an average water content of 9.1%. A proctor compaction test performed on a representative bulk sample produced γd)max = 124 lb/ft3 and optimum water content = 12.8%. A proposed grading plan calls for 12,000 yd3 of cut and 11,500 yd3 of fill, and the specification call for a relative density of at least 90% (** Use 90%, do no change the value). Compute (a) required quantity of export or import soils based on the unit weight of the cut, and (b) required quantity of water in gallons to bring the fill soils to the optimum moisture content. CE 3343 – Soil Mechanics Final Exam – Spring 2021 CE 3343 – Soil Mechanics Final Exam – Spring 2021 Problem 2 The embankment shown is to be constructed very rapidly at the surface of the profile as shown in Figure 1. Preconsolidation pressure (max past pressure) for the clayey soil at mid depth is given as 3000 psf. Determine the magnitude of settlement due to consolidation of the clay layer at the centerline of the fill after one year only. (Cr or Cs = 1/5Cc) Figure 1 CE 3343 – Soil Mechanics Final Exam – Spring 2021 CE 3343 – Soil Mechanics Final Exam – Spring 2021 Problem 3 Figure 2 CE 3343 – Soil Mechanics Final Exam – Spring 2021 CE 3343 – Soil Mechanics Problem 4 Final Exam – Spring 2021 CE 3343 – Soil Mechanics Final Exam – Spring 2021 Question 1 3.5 pts Estimate the number of trips generated in zone 632 given the forecasted number of households. Trip Rates Household size Household size Household size Mean rate Household 1-2 3 4+ Income s 25 K 5.7 7.2 8.3 7.5 > 25 K and 65 K 9.1 10.8 13.6 12.2 Mean rate 7.6 8.9 12.1 Forecasted # of households in zone 632, Household size Household size Household size Household Income 1-2 3 4+ < 25 K 21 47 36 >25 K and 365K 43 78 27 > 65 K 9 21 24 5.941 2771 *** I r YES NENAS NOSILN4 SASSIN JC DO Mean rate 7.6 8.9 12.1 Forecasted # of households in zone 632, Household size Household size Household size Household Income 1-2 3 4+ s 25 K 21 47 36 >25 K and 565K 43 78 27 > 65 K 9 21 24 5.941 ?? O 2.774 2.907 2.830 Next 31 1 SUV SAS DC This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 2 2.5 pts A 800' vertical curve with G1 = -3% and G2 = +2% has a PVC @ station 65+11 with an elevation of 468.2. What is the slope of the curve at station 69+11? 0% 2% - 1% -3% -0.5% « Previous Next Not saved Submit Quiz ?? ? wo 30 This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 3 6 pts For a flexible pavement with a SN = 5. Determine the daily 18-kip-equivalent single-axle loads for: 1. 500 trucks with a 12-kip single axle, 28-kip tandem axle and 30-kip tandem axle. 2. 400 trucks with a 12-kip single axle, 32-kip tandem axle and 36-kip tandem axle. O 1.642 15,315 O 2.745 1.484 Next > « Previous 143 ***** ***** ************ TE *** C C 1 - Ind uphold the spirit of the Honor Code." Question 4 5 pts Determine the optimal 4 phase cycle length for an intersection joining two 4-lane arterials. Assume 5% trucks and all approaches have left-turn bays; pedestrian walking speed will be 3 ft/second. Assume 20' vehicles and lost time of 7 seconds/phase. Bismarck has a speed limit of 50 mph and Charleston has a speed limit of 35 mph. Bismarck is 84' wide and Charleston is 62' wide. Critical Lane Group Flow ratio for critical lane group 1 137 2 .258 3 .119 4 .326 no 105 95 294 265 Next → « Previous si DO Question 1 3.5 pts Estimate the number of trips generated in zone 632 given the forecasted number of households. Trip Rates Household size Household size Household size Mean rate Household 1-2 3 4+ Income s 25 K 5.7 7.2 8.3 7.5 > 25 K and 65 K 9.1 10.8 13.6 12.2 Mean rate 7.6 8.9 12.1 Forecasted # of households in zone 632, Household size Household size Household size Household Income 1-2 3 4+ < 25 K 21 47 36 >25 K and 365K 43 78 27 > 65 K 9 21 24 5.941 2771 *** I r YES NENAS NOSILN4 SASSIN JC DO Mean rate 7.6 8.9 12.1 Forecasted # of households in zone 632, Household size Household size Household size Household Income 1-2 3 4+ s 25 K 21 47 36 >25 K and 565K 43 78 27 > 65 K 9 21 24 5.941 ?? O 2.774 2.907 2.830 Next 31 1 SUV SAS DC This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 2 2.5 pts A 800' vertical curve with G1 = -3% and G2 = +2% has a PVC @ station 65+11 with an elevation of 468.2. What is the slope of the curve at station 69+11? 0% 2% - 1% -3% -0.5% « Previous Next Not saved Submit Quiz ?? ? wo 30 This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 3 6 pts For a flexible pavement with a SN = 5. Determine the daily 18-kip-equivalent single-axle loads for: 1. 500 trucks with a 12-kip single axle, 28-kip tandem axle and 30-kip tandem axle. 2. 400 trucks with a 12-kip single axle, 32-kip tandem axle and 36-kip tandem axle. O 1.642 15,315 O 2.745 1.484 Next > « Previous 143 ***** ***** ************ TE *** C C 1 - Ind uphold the spirit of the Honor Code." Question 4 5 pts Determine the optimal 4 phase cycle length for an intersection joining two 4-lane arterials. Assume 5% trucks and all approaches have left-turn bays; pedestrian walking speed will be 3 ft/second. Assume 20' vehicles and lost time of 7 seconds/phase. Bismarck has a speed limit of 50 mph and Charleston has a speed limit of 35 mph. Bismarck is 84' wide and Charleston is 62' wide. Critical Lane Group Flow ratio for critical lane group 1 137 2 .258 3 .119 4 .326 no 105 95 294 265 Next → « Previous si DO Surces. TWITTUTIOW TIC Test suunuurus or megnicy ururuprioru te spm or TC Tronor couc. Recen Question 5 3.5 pts Determine the critical lane group volume (per lane) for the EB/WB through/right phase in a 4-phase cycle at an intersection joining two 4-lane arterials. Assume 5% trucks and all approaches have left-turn bays; pedestrian walking speed will be 3 ft/second. Assume 20' vehicles and lost time of 7 seconds/phase. Bismarck has a speed limit of 50 mph and Charleston has a speed limit of 35 mph. Bismarck is 84' wide and Charleston is 62 wide. Charleston WB Charleston EB Bismarck NB Bismarck SB LT 74 65 145 115 Through 255 319 521 481 RT 111 96 136 178 383 210 ho 465 232 Next • Previous Not saved Submit Quiz Do 20 This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." D Question 6 3 pts Determine the free flow speed for a 3-lane basic freeway segment with a speed limit of 65 mph and a diamond interchange every 2.4 miles, 11 foot lanes, and 3 foot right hand or left hand side shoulders. 62.0 mph 65.0 mph 60.2 mph 64.1 mph « Previous Next > Os cued at 19.11n 6 M AN *** 3 *** 18 A******* ******** AUSSTATT ***** AN ***** 7.5 pts Determine the clearance time for Bismarck for an intersection joining two 4-lane arterials. Assume 5% trucks and all approaches have left-turn bays; pedestrian walking speed will be 3 ft/second. Assume 20 vehicles and lost time of 7 seconds/phase. Bismarck has a speed limit of 50 mph and Charleston has a speed limit of 35 mph. Bismarck is 84' wide and Charleston is 62' wide. Charleston WB Charleston EB Bismarck NB Bismarck SB LT 74 65 145 115 Through 255 319 521 481 RT 111 96 136 178 O 7 5.5 6.5 6 5 Next « Previous Submit Quiz Quiz saved at 12:11pm LASNA DC o academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 8 7.5 pts For a 4-lane highway with 12 foot lanes with a design speed of 70 mph, which has a stopping sight distance of 730. The roadway cross section includes a 45' median and 8' shoulders in both travel directions. If the curve radius is 1.675. how much right of way must be cleared from the inside edge of the shoulder? 41.6 25.6 42.7 26.7 « Previous Next Not saved Submit Quiz 3 oc DO This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 9 3 pts Determine the minimum centerline radius for a six-lane (12-foot lanes) highway with 10 foot shoulders, a design speed of 65 mph and a superelevation of 0.05. 825 1.765 1.795 1.810 855 < Previous Next > ***** * ***** ******** S0343 ***** Ce JL highest standards of integrity and uphold the spirit of the Honor Code." Question 10 5.5 pts Determine the green time for the Charleston through movement (CLG 2) for an intersection joining two 4-lane arterials with a 4 phase cycle length of 100 seconds. Assume 5% trucks and all approaches have left-turn bays; pedestrian walking speed will be 3 ft/second. Assume 20 vehicles and lost time of 7 seconds/phase. Bismarck has a speed limit of 50 mph and Charleston has a speed limit of 35 mph. Bismarck is 84' wide and Charleston is 62' wide. Critical Lane Group (CLG) Flow ratio for critical lane group 1 - Charleston LT .137 2 - Charleston 258 3 - Bismarck LT .119 4 - Bismarck .326 38 28 22 30 Next Previous 6 ? ? ? ?? ?????? ***** 17 Question 11 7 pts Using the gravity model, estimate the number of trips from zone 3 to zone 1. Zone Productions Attractions 1 3875 2188 2 2690 4152 3 1350 4867 Travel Cost Matrix 1 2 3 1 12 17 2 9 13 3 13 12 1 418 615 1.201 214 Next < Previous G ??? 5 will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." D Question 12 3 pts For a conservative design of a 6-lane highway with lifetime ESALS of 4.5 million and daily ESALS of 472. What is the design life of the pavement? 43 32 78 26 Next → < Previous Not saved Submit Quiz C I be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 13 8 pts Determine the minimum curve length for a -1.5% grade connected to a +5.25% grade for a 70 mph design speed. O 1.667 712 1,370 1.218 < Previous Next Not saved Submit Quiz 3 3. *************** This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 14 5 pts TxDOT wants to know the time mean speed (in mph) on a 0.5 mile section of US-380. They collected the times (in seconds) to traverse the section for 7 vehicles: 45.3, 30.7. 28.8, 31.5. 25.0, 27.2, 28.9 29.0 119.6 58.0 59.8 Next → Previous Not Found Submit © 415 *** DC 2 code: pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 15 9 pts Please find the speed and level of service of an ideal 6 lane freeway near no ramps with a free flow speed of 75 mph, a volume of 4,450 vph, fhvis 0.917, and a PHF of 0.932. 75.0. LOS A 69.7 LOS C 75.0. LOS B 69.0. LOS C < Previous Next > Not saved Submit Quiz © SN hiye ***** MAN 41 *********** ******** *** AIS 314 3 Question 16 9 pts A planning agency has calibrated a logit mode split model to have the following utility expression: U =ak - 0.08Tv -0.057T, – 0.12C 712 Where: Um is the utility associated with mode m, Tw is the waiting time, T, is the running time, and C is the out-of-pocket cost. Mode ak Waiting Time Running Time (min) (min) Cost ($) Auto o 5 28 6.7 Bus -1.3 27.5 38 2.5 Please estimate the auto trips when 615 trips occur from zone 3 to zone 1 615 199 390 590 Next → < Previous C WS ******** *** SIASA SAN *** si Coco 3 work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 17 6 pts Given user equilibrium assignment and two possible paths from zone 3 to zone 1. Please identify the travel time from zone 3 to zone 1 for 1,201 trips when path a and path b have the following link cost functions: ta = 8+.01va . to = 11+.0250) 19.6 17.4 19.0 14.0 Next → < Previous Not saved Submit Quiz ********* ***** ******** Co This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 18 2.5 pts TxDOT wants to know the space mean speed (in mph) on a .5 mile section of US-380. They collected the times in seconds) to traverse the section for 7 vehicles: 45.3, 30.7, 28.8, 31.5, 25.0, 27.2, 28.9 59.6 0.016 58.0 29.0 < Previous Next > Quiz saved at 12:16pm Submit Quiz G » C 1 This test should be completed under the UTA academic honor code: "I pledge, on my honor, to uphold UT Arlington's tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. I promise that I will submit only work that I personally create or that I contribute to group collaborations, and I will appropriately reference any work from other sources. I will follow the highest standards of integrity and uphold the spirit of the Honor Code." Question 19 3.5 pts What thickness of crushed stone subbase is required to achieve a SN = 5, if it has a 4 inch HMA concrete surface layer and 8.5 inches of soil cement? Drainage is not a problem. 14 O 11 12 13 « Previous AT Not saved Submit Quiz 6 ?? DC 8:08 AM Tue May 11 79% Achegg.com Answer: Sf HCL 109. (***') 1+eo ' + ( 20' * 110 ? (19) * 112.4 ' → 2762 psf stress Caused to embankment due 10' 45'k 151 to 101 151 10 201 501 201 20 lo 1201 AS! → 20 * 120 2400 Pst (10') (0.450) . Sf 2762 +2400 logio 1 + 120 27 62 St > 0.678 ft Comment 8:10 AM Tue May 11 79% chegg.com was this answer helpful? o 1,822 answers Solution: Determine the magnitude of settlement: By using the relation as shown in below; S = HC 1+CO -10510 σ' + Δσ' có Determine the stress: 10 co' = 20x110+x112.4 2 = 2200+562 = 2762 psf Ad' is denoted stress caused due to embankment 50 20 Δσ' =20x120 = 2400 psf Find the magnitude settlement: 10510 2762 +2400 2762 , 1+1.20 = 2.045(0.271) = 0.5549ft