Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 6, Problem 22P
To determine
The phenomenon of gap acceptance with respect to merging and weaving maneuvers in traffic streams.
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Chapter 6 Solutions
Traffic and Highway Engineering
Ch. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10P
Ch. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - The arrival times of vehicles at the ticket gate...Ch. 6 - Prob. 27P
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- By assuming a linear speed-density relationship, the mean free speed on a highway facility lane equals 55 mph near zero density, and the jam density is observed to be about 170 veh/mi. Write down the speed-density and flow-density equations. Plot the q-v curves in proper order. Compute speeds and densities corresponding to a flow of 900 veh/hr, describing traffic conditions from a driver's point of view. Calculate average headways, gaps, clearance, and spacing at maximum flow and at jam density. Discuss all the results you obtain. Are they realistic?arrow_forwardFor the case of a bottleneck in a highway where two lanes in one direction must narrow down to one lane, if the flow in vehicles/hour is greater than the capacity of the bottleneck but less than the capacity of the unrestricted two lanes of travel, a queue will form, and its length will increase over time. A) True B) Falsearrow_forwardPlz solve fast! A traffic stream display average vehicle time headway of 2 sec at space mean speed 60 km/hr compute average space headway, flow rate and density for traffic stream?arrow_forward
- For the Greenshields model, the mean free flow speed on a highway facility lane equals 75 mph near zero density, and the jam density is observed to be about 160 veh/mi. Plot the q-k-u curves in proper order. Write down the speed-density, flow-speed, and flow-density equations. Find out the maximum flow, and also mark it on your diagrams. Compute speeds and densities corresponding to a flow of 2,880 veh/h, describing traffic conditions from a driver’s point of view. Calculate average headways, gaps, clearance, and spacing at CASE 1: maximum flow and at CASE 2: jam density. (Suppose the average vehicle length is 17ft)arrow_forwardthe picture attached represents the traffic entering and leaving a type of roundabout road junction in Continental Europe. Such roundabouts ensure the continuous smooth flow of traffic at road junctions. Construct linear equations that describe the flow of traffic along the various branches. Use these equations to determine the minimum flow possible along x1. What are the other flows at that time? (it is not necessary to compute the reduced echelon form. Use the fact that traffic flow cannot be negative.)arrow_forwardDraw the diagram and compute the passing sight distance for the following data:Speed of the passing car = 96 kphSpeed of the overtaken vehicle = 88 kphTine of initial maneuver = 4.3 secAverage acceleration = 2.37 kph/secTime passing vehicle occupies the left lane = 10.4 secDistance between the passing vehicle at the end of its maneuver and the opposing vehicle = 76 marrow_forward
- The figure shows two possible paths for negotiating an unbanked turn on a horizontal portion of a race course. Path A-A follows the centerline of the road and has a radius of curvature ρA = 84 m, while path B-B uses the width of the road to good advantage in increasing the radius of curvature to ρB = 212 m. If the drivers limit their speeds in their curves so that the lateral acceleration does not exceed 0.90g, determine the maximum speed for each path.arrow_forwardUse linear regression to fit the highway speed/density data shown here to the Greenshields model, and use it to determine: a. The mean free flow speed b. The jam density The capacity The speed at max flow R² of this dataarrow_forwardCar A experienced engine failure the moment it enters a 2-km highway that has a constant grade of 4 deg throughout its span (4 deg. inclination). Point C is the location where car A experienced failure. When car A is towed by the truck it gains an acceleration of 3 m/s^2, at the same instance, car B is passing the same highway with a constant velocity of 40 km/hr and is 100m away from point C (measured along the pavement). 1. At what time will car A overtake car B? answer in unit of seconds. 2. How far from point C (along the pavement) will the two cars meet? answer in unit of meters 3. What is the velocity of car A at the instance it overtakes car B? answer in unit of km/hrarrow_forward
- Car A experienced engine failure the moment it enters a 2-km highway that has a constant grade of 4 deg throughout its span (4 deg. inclination). Point C is the location where car A experienced failure. When car A is towed by the truck it gains an acceleration of 3 m/s^2, at the same instance, car B is passing the same highway with a constant velocity of 40 km/hr and is 100m away from point C (measured along the pavement). 4. Car A will eventually overtake car B. How much time (from the moment the two cars met) will elapse when car A be 50 m away (measured along the pavement) from car B? 5. Car A will eventually overtake car B. At an instance where car A is 50m ahead of car B (measured along the pavement), what is the velocity of car A? answer in km/hr. 6. Car A will eventually overtake car B. At an instance where car A is 50m ahead of car B (measured along the pavement), how far is car B from point C? answer in unit of metersarrow_forwardOn a specific westbound section of highway, studies show that the speed-density relationshipisarrow_forwardA traffic stream in a particular direction ofa two lane road is moving with a constantspeed of 50 kmph, with an average headway of 2.52 seconds. Find the longitudinal distance between two consecutive vehicles.arrow_forward
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