2. The driver of a car travelling at a certain speed suddenly sees an obstruction ahead and travelled a distance of 58.3 m during the perception-reaction time of 1.3 seconds. Determine the car's speed of approaching in kph. (1 pts)

2. The driver of a car travelling at a certain speed suddenly sees an obstruction ahead and travelled a distance of 58.3 m during the perception-reaction time of 1.3 seconds. Determine the car's speed of approaching in kph. (1 pts)

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter10: Capacity And Level Of Service At Signalized Intersections

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: 3. A car has an initial speed of 25 m/s and a constant deceleration of 3 m/s^2. Determine the…

A: Using equations:v-u=atv2-u2=2ass=ut+12at2

Q: Problem 28: Compute the minimum time headway for cars moving at an average speed of 60 kph. The…

A: Given data, Average speed = 60 kph Average length of vehicle = 4.2 m Reaction time = 0.8 sec…

Q: The driver of a vehicle sees an object on a level road 150m in front of them and takes evasive…

A: Sight distance: The length of the road visible ahead to the driver from a specified height at any…

Q: 2/184 For the instant represented, car A is rounding th. circular curve at a constant speed of 30…

Q: The velocity of a particle travelling along the a straight line is v= (3t²-6t)m/ s, where t is in…

Q: Th speeds of 25 cars were observed. 10 cars were noted to travel at 38 kph, 8 cars at 39 kph, 2 cars…

Q: The weight of object A is 8.65 N and the weight of object B is 5.75 N. Object A is moving at a…

Q: 6. A particle has an initial velocity of 100 fps up to the right at 30 with the horizontal. The…

Q: 11.9 The brakes of a car are applied, causing it to slow down at a rate of 10 ft/s. Knowing that the…

Q: 1 An automobile moving at a constant velocity of 15 m/sec. p

Q: A particle traveling in a straight line starts from rest it has an acceleration of a=B³t²+ct, if B =…

A: Given: acceleration(a)=B3t2+ctB=8 m/s4c=-2 m/s3t=3 sec Substitute the values in the given formula:…

Q: 3. A moving vehicle come up to a danger and traveled a distance of 48 meters during the perception…

A: Stopping Sight Distance (SSD) is given by : SSD=0.278 V Tr + V2254(f±s%) Given SSD = 48m Tr = 2.67…

Q: Calculate the coefficient of return (e) for a ball thrown with an initial velocity of 5 m/s if its…

Q: For the shaded area shown in figure, use R equals the last digits of your ID no. in mm (Ex. ID no…

Q: Q1: The center of mass G of a high jumper follows the trajectory shown. Determine the component vo,…

A: Solution Given Data H=1.06 m

Q: A bucket is hanging from a horizontally moving crane. Calculate the maximum allowable speed (m/s) of…

Q: A ball thrown vertically upward with an initial velocity of 3 m/s from the window of a tall…

Q: Problem 3: A ball thrown with an initial velocity of 30 m/sec as shown below, just clears the edges…

A: Given, Initial velocity, v0 = 30 m/s and tanθ = 43. ⇒ sinθ = 45 and cosθ = 35 Horizontal…

Q: 1. If the velocity distribution is uniform at section 1, what is the value of the Momentum flux…

A: Control Volume is a volume fixed in space or moving with constant velocity through which the fluid…

Q: At time t = 0, a particle is at rest in the x-y plane at the coordinates (xo, Yo) = (6, 0) in. If…

A: ax=d2xdt2=0.71-0.49tparticle start at rest so at t=0,…

Q: 1. A particle traveling in a straight line starts from rest it has an acceleration of a=B³t2+ct, if…

A: Step 1

Q: A motorist is traveling at 54kph when she observes that a traffic light 240 m ahead of her turns…

Q: Car B is traveling a distance dahead of car A. Both cars are traveling at 60 ft/s when the driver of…

Q: Magnetic tape is being transferred from reel A to reel B and passes around idler pulleys C and D. At…

A: Givenan for P1 = 29 m/sat for P2 = 47 m/s2ρ1= 0.116 m = radius of carvature path with point P1ρ2 =…

Q: Car A is traveling at a constant speed vA = 125 km/h at a location where the speed limit is 100…

Q: A motorist is travelling at 72km/hr when he observes that a traffic light ahead of him turns red.…

A: Given s= 300m u= 20m/s t= 22s To Calculate - a) deceleration (a) = ? b) velocity (v) = ?

Q: In a game of billiards, ball A is moving with a velocity V. = (2.5 m/sec)i when it strikes ball B…

Q: n parallel plates with

A: Assumptions:aFluid obeys Newtons lawbAcceleration is zerocFlow is uniformdNo pressure variation…

Q: Determine the moment of inertia of the shaded area about the axis.

A: To determine the Moment Of Inertia of the given shaded area about y-axis. Given, Dimension a = 140…

Q: - 1 attachment 1. Situation: You are to determine the duration of the yellow light at a highway…

Q: A burglar's car had a start with an acceleration of 2 m/s. A police vigilant party came after 5…

Q: The jeep has a weight of 2700 lb and is travelling forward at 4.563 ft/s when it crashes onto the…

A: Given,W=2700 lbu=4.563 ft/st=0.06sμk=3assuming μk=0.3as coefficient of friction can never be more…

Q: A car driver, after realizing an obstruction, stepped on the brakes and travelled 50m during the…

Q: Vertical Q6) The flow-metering device shown consists of a stagnation probe at station 2 and a static…

Q: and B are traveling with the velocifies shown when they lide. If the coefficient or restitution is e…

A: accident study A moving vehicle collide with the any parked vehicle A moving vehicle collides…

Q: A train is traveling at 60kph along a straight track. If a ball is thrown forward at an angle of 30…

Q: Car B is traveling a distance d ahead of car A. Both cars are traveling at 60 ft/s when the driver…

A: Given :

Q: The velocity flow field in a stcady non-uniform flow is represented by the following oquation,…

Q: A motorist is travelling at 72km/hr when he observes that a traffic light ahead of him turns red.…

A: The answer is found to be Deceleration a=-04958 m/s^2 Velocity at traffic light v=9.0924 m/s For…

Q: WA driver is travelling at 60 kph on asphalt road. An object is stopped on the road 264 ft a head…

A: Given Speed = 60 Kph Stopping sight distance= 264 ft note 1 ft= 3.281 m

Q: It was observed that a tennis ball when served horizontally 7.5 ft above the ground strikes the…

Q: ars A and B starts from rest at the intersection of two roads which makes an angle 60° with each…

A: (a) relative displacement

Q: road block 112 m away. He applied the brakes and the car decelerated uniformly at 6.4 m/s^2. It…

A: Hello dear this is the solution of your problem The answer is found to be Initial Speed of vehicle…

Q: Determine the coefficient of restitution e between ball A and ball B. The velocities of A and B…

Q: 9.An alert driver (with a reaction time 0.5 second) is driving uphill on a 4% grade at 36 km/h on a…

A: The stopping sight distance of the vehicle is equal to the sum of lag distance and brake distance.…

Q: and 3. The flow at upstream is still lower than bottleneck capacity the speed density 4. Macroscopic…

A: To describe the traffic, there are different types of the parameters. These parameters describe…

Q: Situation 05. In a science experiment, a test object is launched by accelerating it along a 200-…

A: Given data- 200 m inclineacceleration a=1.25 m/s2Starting velocity u=0 m/sInclined angle θ=35o

Q: The 70-kg boy slides down the smooth water slide. If he starts from rest at A, determine his speed…

Q: In flow past a body or wall, early transition to turbulencecan be induced by placing a tripwire on…

A: Given data: Trigger turbulence Udν=850 Sphare diameter (D) = 20 cm = 200 mm ReD = 90,000

Q: The driver speed affects the reaction time and less affect the perception time

A: The driver speed affects the reaction and less affect the perception time : Reaction Time : One of…

Concept explainers

Intersection Design

An intersection is a location where two or more roads or railways meet or join. The traffic movement is controlled at the intersection that depends on its design and type. It governs the operation, efficiency, speed, capacity, and safety of the highways, airways, and railways. The movement of the pedestrian causes hazards and delays at the intersection.

Question

2. The driver of a car travelling at a certain speed suddenly sees an obstruction ahead and
travelled a distance of 58.3 m during the perception-reaction time of 1.3 seconds.
Determine the car's speed of approaching in kph. (1 pts)

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

The driver of a car travelling at a certain speed suddenly sees an obstruction ahead and travelled a distance of 55.8 m during the perception time of 1.45 sec. Determine the car's speed of approach in kph.
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 distance traversed during perception-reaction time is equal to 10 meters if the speed of the car is 10 meters per second, and the perception-reaction time of the driver is 1 second. TRUE OR FALSE
9.An alert driver (with a reaction time 0.5 second) is driving uphill on a 4% grade at 36 km/h on a dry pavement when suddenly a person steps from behind a parked car in the path of the driver. The coefficient of friction of the pavement is 0.7. How long is the stopping distance of the car? A. 12.73m B. 11.89m C. 21.86m D. 20.24m
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.
One of the two motor vehicles is moving up the ramp at 90 km / h on a road with a slope of 3%, the other goes down the ramp at a speed of 20 km / h on the opposite lane. What should be the shortest distance for two vehicle drivers to see each other in order to prevent collision by braking? The reaction time is 2.0 seconds and the sliding friction coefficient is 0.25.
A driver travelling at 50 mph sees a wall at a certain distance ahead. The driver applies the brakes immediately (perception time is 2.5 seconds) and begins slowing the vehicle at 6 m/sec^2. If the distance from the stopping point to the wall is 12 m, how far was the car from the wall upon perception?
A driver driving at 69 kph at a straight flat portion of the highway suddenly encounters an obstruction. He applies his brakes. If the coefficient of friction of the roadway to the tires is equal to 0.5, calculate the maximum safe distance (rounded to the nearest meters) the driver can apply his brakes to avoid collision. g = 9.81 m/s^2
A driver with a reaction time of 2.0 second is driving downhill on a 2% grade when suddenly a cat steps from behind a parked car in the path of the driver at a distance of 32m. In which scenario can the driver stop the car in time?
A motorist is traveling at 54kph when she observes that a traffic light 240 m ahead of her turns red. If the motorist wishes to pass the light without stopping just as it turns green again, determine (a) the required uniform deceleration of the car, (b) the speed of the car as it passes the light.
A train is traveling at 60kph along a straight track. If a ball is thrown forward at an angle of 30 degrees above the horizontal in the direction of the train with a velocity of 20m/s relative to the train, 5m above the ground, determine its speed when it strikes the ground. Answer in m/s Hint: Use resultant of VBx and VBy
d) Determine the safe stopping sight distance while traveling at speed of 60 kmph. Assuming perception and brake reaction time is 2.5 sec. and coefficient of friction varying from 0.40 at 20 kmph to 0.35 at 100 kmph. Case: 1. level Ground 2. Upward gradient of 3%