A stream of traffic moving at a speed of 40km/h and a concentration of 20veh/km is stopped for 2mins by a herd of cattle crossing the road. After the herds departure, the vehicles began moving at a speed of 20km/h and a concentration of 60veh/km. Assuming a jam concentration of 150veh/km, calculate i. The velocity and direction of the stopping wave ii. The length of the line of cars stopped during the 2mins period iii. The number of cars stopped during the 2mins iv. The velocity of the shock wave resulting from the dissipation of the

A stream of traffic moving at a speed of 40km/h and a concentration of 20veh/km is stopped for 2mins by a herd of cattle crossing the road. After the herds departure, the vehicles began moving at a speed of 20km/h and a concentration of 60veh/km. Assuming a jam concentration of 150veh/km, calculate i. The velocity and direction of the stopping wave ii. The length of the line of cars stopped during the 2mins period iii. The number of cars stopped during the 2mins iv. The velocity of the shock wave resulting from the dissipation of the

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter7: Intersection Design

Section: Chapter Questions

Problem 27P

See similar textbooks

Similar questions

The average spacing of the cars moving along the same lane of an expressway is 54.3 m center to center. Determine the volume of traffic in veh/hr if the average velocity of the cars is 51 kph.
The velocities of commuter trains A and B are as shown. Knowing that the speed of each train is constant and that B reaches the crossing 3 min after A passed through the same crossing, determine the distance between the fronts of the engines 10 min after A passed through the crossing (Answer in whole number of a meter).
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
The spacing of the cars moving along the same lane of an expressway is 40 m center to center. If the average velocity of the car is 60 kph, determine the volume of traffic in veh/hr.
A driver on a level two-lane highway observes a truck completely blocking the highway. The driver applied the brakes and utilized the maximum longitudinal friction of 0.45 between the wet pavement surfaces and tires. The vehicle stopped only 10 m from the truck. If the driver was driving at 100 km/h, how far was she from the truck when she first observed it (assume perception-reaction time is 1.5 seconds)? How far was she from the truck at the moment the brakes were applied
The following equation describes flow-density relationship: q=46k−0.30 k^2 where q is in vehicles per hour. Use Greenshield’s model. a.Calculate flow at capacity. b.Calculate the jam density. c.Calculate the shockwavespeed from initialdensity of 76 vpk to final density of 129.2 vpk.
a driver is traveling at 65 mi/h rounds a curve on a level grade to see a truck overturned across the roadway at a distance of 350 ft. if the drivers is able to decelerate at a rate of 10 ft/s2. At what speed will the vehicle hit the truck? Plot the result for reaction times ranging from 0.5 to 5 seconds in increments of 0.5 seconds
Calculate the stopping sight distance on a highway at an ascending gradient 2% for a design speed of 90 kph with a total reaction time of 2.5 sec and a coefficient of 0.42.
A vehicle is moving along a straight line having an initial speed of 10 m/s. It is experiencing a deceleration of -0.5v2 m/s2 . Determine the distance travelled by the vehicle after three seconds.
A car (SEDAN) is to overtake a bus as it enters an acceleration lane. The speed of the SEDAN is 80 kph initially. The bus is at the same speed as the SEDAN. Given the perception reaction time as 2.70 seconds and the average acceleration of the vehicle is 2.55 m/s2, solve the: a. The passing sight distance (in furlong) that the SEDAN could move while overtaking the slow-moving bus before meeting the on-coming opposing vehicle if the velocity of SEDAN increases to 90 kph and the time for it tooccupy the left lane is 12.50 seconds. The opposing vehicle travels at a speed of 70 kph and the time for it to reach a point before it passes the SEDAN is 0.18 minutes. The between the SEDAN at the end of its and the opposing vehicle is 91.60 yards.
In a 600 m section of highway, there are 12 vehicles observed. Determine the time headway if thespace mean speed of the vehicles is 60 kph
Cars A and B approached each other on a straight road from points 468 meters apart. A has an initial speed of 75 kph and is decelerating at the rate of 0.42 m/s^2. B has an initial speed of 29 kph and is accelerating at the speed of 0.3 m/s^2. At what time (seconds) will the cars be 202 meters apart from each other?