Determine the free flow speed (km/hr), jam density (veh/km), and the capacity (veh/hr) of a rural highway in one direction, if the speed-density relation obtained is, u = 85.41 - 0.763k Free Flow Speed Jam density Capacity (Max. flor rate)
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- You are given with the following speed-flow density curve for a particular facility. Find out the capacity of that facility using this relationship. V = 55 – 0.45 K2 V: speed (kmph); K: density (veh/km)Given the following data on a certain highway section: uf=90km/hr and qcap=3600veh/hr Calculate the density corresponds to the flow value q=900veh/hrUsing Greenshields' model, for a highway with a mean free flow speed of 76 mi/h and jam density of 128 veh/mi, determine the density (in veh/mi) when the mean speed is observed to be 58 mi/h:
- Given a freeway flow study at a certain highway. The speed- density relationship is described in thegiven equation or relationship:V s = 60- 0.48kDetermine the following:a. Free-flow speed and jam densityb. Derive the equation describing flow and speed.c. Derive the equation describing flow and density.d. Determine the capacity of highwayA trailer from a minor road joins a major road traffic stream having a flow of 2000 veh/hrand a density of 18veh/km. The heavy traffic in the opposite stream makes it difficult forvehicle to overtake it once in the traffic stream. The trailer moves at a speed of 60Km/hr forstretch of 15km. The effect of the entry of the trailer into the traffic stream is an increase inthe density of the traffic behind to 30 veh/Km. Determine the number of vehicles that willbe in the traffic stream when the trailer eventually leavesChoose the right answer a rural highway on a level terrain has the following traffic composition: 40 % Passenger cars 30 % trucks 20 % buses 10 % recreational vehicles Find the total volume expressed as pcu/hr. if the total volume is 6000 veh/hr. * a-7620 b-7630 c-7640
- A Greenberg’s model was developed based on data collected from a roadway. The following values are given: Dj = 130 veh/mi; D = 30 veh/mi when S = 30 mi/h. Find the maximum flow for this traffic stream (vmax)Determine the density of traffic on a highway for free flow speed of 80 km/hr and flow rate of 1200 pc/hr/lnGiven a freeway flow study at a certain highway. The speed- density relationship is described in the givenequation or relationship: V s = 58- 0.40k Determine the following:a. Free-flow speed and jam densityb. Derive the equation describing flow and speed.c. Derive the equation describing flow and density.d. Determine the capacity of highway
- Topic: Transportation engineering Free-flow speed of a lane of a road is 120 km/h and the jam density is 80 veh/h. Prove that the maximum flow will be 2 400 veh/hOn a road, the speed - density relationship of a traffic stream is given by u = 70 - 0.7 k (where speed, u, is in km/h and density, k, is in veh/km). At the capacity condition, the average time headway will beThe traffic volume for a section of a highway can be estimated using the following equation: q = 15.1k[ln (195) - In(k)] Where q is the traffic flow measured in veh/hr and k is the traffic density measured in veh/mi. Based on the provided information, estimate the following (Show all your calculation steps): Maximum flow a. b. Jam density C. Maximum density