Road accident 'black spots' are locations that attract more accidents by comparison with other similar locations on the road system. Speed has been identified as a key risk factor in road traffic injuries at 'black spots' influencing both the risk of a road crash as well as the severity of the injuries from the crash. Interpret FIVE (5) benefits resulting from a spot speed study at the 'black spots' location conducted during Malaysia's festival season at KM399.8 of North-South Expressway. (CO1-PO3)(C3)
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- A rural primary road segment of 2 miles long has an average annual daily traffic(AADT) of 11,350. The number of crashes that have occurred over the past 5 yearsare 5 fatal, 55 injury crashes and 100 property damage only crashes. Statewide averagecrashes for this type of road are 2 fatal, 130 injury, and 300 property damage onlycrashes per 100 MVMT. The weighting factors for fatal, injury and property crashesare 8, 3, 1, respectively. Using the critical crash ratio methodology, determine whetherthis site can be labeled a hazardous site. Use a 95 percent confidence limit.4-14 Table 4.10 shows data obtained in a travel time study on a section of highway using the moving-vehicle technique. Estimate (a) the travel time and (b) the volume in each direction at this section of the highway. Chapter 4 Traffic Engineering Studies 149 Table 4.10 Travel Time Data for Problem 4-14 No. of No. of No. of Vehicles Vehicles That Vehicles Run Travel Traveling in Орposite Overtook Overtaken by Test Vehicle Direction/ Time Test Number (min) Direction Vehicle Northward 5.25 100 2 2 2 5.08 105 2 1 3 5.30 103 3 1 4 5.15 110 1 5.00 101 6. 5.51 98 7 5.38 97 1 1 8 5.41 112 2 3 5.12 109 3 1 10 5.31 107 Southward 1 4.95 85 1 2 4.85 88 1 3 5.00 95 1 4 4.91 100 2 1 4.63 102 1 5.11 90 1 1 7 4.83 95 8 4.91 96 3 1 9 4.95 98 1 2 10 4.83 90 1Match the following to true or false. A highway operating at LOS C has a better quality of service than LOS E. If the drivers using a highway are all daily commuters who are familiar with the facility, then the driver population correction term is equal to 0.85. A recovery shockwaves is the one that results in dissipation of congestion The formulas that we studied for freeway LOS evaluation are based on the version of the Highway Capacity Manual published in year 2000. A. True B. False
- Question 3 In which of the following scenarios using traffic simulation is more helpful than data-driven predictive models? A. Understanding the impact of road occupancy license (ROL) type of works on the traffic of the surrounding road network B. Estimating the hourly traffic speed and volume under normal traffic conditions C. Proposing alternative route options for vehicles after an incident occurs on a high demand road A Both A and C ODetermine the crash modification factor that can be used to estimate the change in frequency of the crash type targeted by a proposed improvement that will widen a two-lane rural highway from 9-ft-wide (per lane) to 11-ft-wide (per lane) if the highway has an AADT of 1500 veh/day.For a specific rural road segment in northeast Colorado, the total number of crashes as well as the number of fatal crashes have been recorded. Using the data provided with a traffic analysis within two standard deviations (or 95% confidence interval), determine if this site should be flagged for further study. Data: Length of road segment = 2 mi. AADT = 11,350 veh/day Total number of injury crashes for past 5 years = 55 Total number of fatal crashes for past 5 years = 5 Total number of property-only crashes for past 5 years = 100 Average number of statewide injury crashes for rural roads over past 5 years = 1.30 per 106 VMT Average number of statewide fatal crashes for rural roads over past 5 years = 0.02 per 106 VMT Average number of statewide property only crashes for rural roads over past 5 years = .033 per 106 VMT Weighted average crash rate of injury crashes for rural Colorado roads = 3 Weighted average crash rate of fatal crashes for rural Colorado roads = 8 Weighted…
- A 1.5-mile section of a two-lane road has an AADT of 10,000. In a three-year period, there have been 6 fatal accidents and 12 non-fatal accidents. The state allows 350 accidents per 100 mvm for three years, of which 100 are fatal. For which value of confidence level, this highway is considered safe? If the following countermeasures are implemented: widening the existing lane by 2 feet, and widening the existing shoulder by 2 feet paved, and widening the clear zone by 5 feet, what will be the number of accidents reduced if the AADT became 12,000?Problem 2 The table shows reported accidents for a 10-mile highway section of the Diosdado Macapagal Boulevard. Property Damage Year 2000 2001 2002 2003 2004 Average Daily Traffic 20,500 22,000 23,500 24,000 25,500 165 150 170 170 160 Injury Accidents 40 45 50 45 60 a) Compute the severity ratio. b) Compute the accident rate for injury accidents in HMVM. c) Compute the accident rate in HMVM. Fatal Accidents 5 5 10 16 191.A stretch of four-lane, two-way highway 6.0 km long has a traffic volume of 35,450 vehicles per day. If for the last three years, the total number of accidents recorded was 1,960, determine the accident rate per99 mvk. A__833.421 accidents per 99 mvk. B__833.142 accidents per 99 mvk. C__833.124 accidetns per 99 mvk. D__none of the above 2.A section of road has 65 accidents recorded in three years. For the same period, the estimated vehicle travel on the section was 26 mvk. Considering only those sections having the same characteristics as under study, the mean rate is 75 accidents per 100 mvk. Is the section hazardous with 99 percent level of confidence? A__YES B__NO C__UNDEFINE 3.The traffic accidents recorded from the past 3 years on a two-lane highway shows that there is a total of 545 property damage only, 135 for injury and 10 fatalities. Determine the severity ration of this data? A__22% B__20.104% C__21.014%…
- To study congestion in the core of a city, a survey measured traffic volume at a busy intersection between the hours of 1300 and 1600. Describe the bias that could influence the results of this survey. Suggest ways in which the survey could be redesigned to reduce the possibility of bias.5. The table below gives data on accepted and rejected gaps of vehicles on the minor road of an unsignalized intersection. If the arrival of major road vehicles can be described by the Poisson distribution, and the peak hour volume is 1100 veh/h, determine the expected number of accepted gaps that will be available for minor road vehicles during the peak hour. Number of Rejected Gaps > t Number of Accepted Gaps >t Gap (t) (s) 1.5 92 3 2.5 52 18 3.5 30 35 4.5 10 62 5.5 2 100The table below gives data on accepted and rejected gaps of vehicles on the minor road of an unsignalized intersection. If the arrival of major road vehicles can be described by the Poisson distribution, and the peak hour volume is 1100 veh/h, deter- mine the expected number of accepted gaps that will be available for minor road vehi- cles during the peak hour. 6-20 Number of Accepted Gaps >t Number of Gap (t) (s) Rejected Gaps >t 1.5 92 3 2.5 52 18 3.5 30 35 4.5 10 62 5.5 2 100