TRANSPORTATION CLASS ASSIGNMENT 1. The traffic flow on a highway is ql=2000 veh/hr with speed of vl=80 km/hr. As the result of an accident, the road is blocked. The density in the queue is k2=275 veh/km. (Jam density, vehicle length = 3.63 meters). Find: (a) The speed of the vehicles at jam density (b) The rate at which the queue grows (in units of vehicles per hour)

TRANSPORTATION CLASS ASSIGNMENT 1. The traffic flow on a highway is ql=2000 veh/hr with speed of vl=80 km/hr. As the result of an accident, the road is blocked. The density in the queue is k2=275 veh/km. (Jam density, vehicle length = 3.63 meters). Find: (a) The speed of the vehicles at jam density (b) The rate at which the queue grows (in units of vehicles per hour)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 25P

See similar textbooks

Similar questions

The 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
Using 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:
A 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 leaves
Assume you are observing traffic in a single lane of a highway at a specific location. You measure the average headway and average spacing of passing vehicles as 3.2 seconds and 20 m, respectively. Calculate the flow, average speed, and density of the traffic stream in this lane. can you explain how to solve thank you
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/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 highway
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 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
Suppose you are noticing traffic in a single lane of an expressway at a particular area. The average headway is quantified as 4.2 seconds. The average spacing of successive vehicles is found as 38 meters. According to the findings, compute the average speed, flow, and density of this stream on the lane.
A freeway with two northbound lanes is shut down because of an accident. At the time of theaccident, the traffic flow rate is 1200 vehicles per hour per lane and the flow remains at this level.The capacity of the freeway is 2200 vehicles per hour per lane when not impacted by an accident.The freeway is shut down completely for 20 minutes after the accident and then one lane is openfor 20 minutes and finally both lanes are opened (40 minutes after the accident). What is theaverage delay per vehicle resulting from the accident (assuming D/D/1 queuing)?
Two routes connect an origin and a destination and the flow is 15000 veh/h. Route 1 has a performance function t1=4+3*x1, and route 2 has a function of t2=b+6*x2, with the x's expressed in thousands of vehicles per hour and the t's in minutes. (a) If the user equilibrium flow on route 1 is 9780 veh/h, determine the free-flow speed on route 2(i.e. b) and equilibrium travel times. (b) If population declines reduce the number of travelers at the origin and the total origin-destination flow is reduced to 7000 veh/h, determine user equilibrium travel times and flows.
In a stream of vehicles, 20% of the vehicles travel at a constant 50 km/hr, 30% at a constant speed of 80 km/hr and the remaining vehicles travel at a constant speed of 100 km/hr. An observer travelling at a constant speed of 60 km/hr over a length of 6 km with the stream is passed by 10 more vehicles than he passes. When the observer travels against the stream at the same speed and over the same length of highway, the number of vehicles met is 390. What is the mean speed and flow of traffic stream being observed? How many vehicles travelling at 100 km/hr are met by the observer while he travels against the stream?