A driver on a level two-lane highway observes a truck completely blocking the highway. The driver was able to stop her vehicle only 10 ft from the truck. If the driver was driving at 70 mi/h, how far was she from the truck when she first observed it (assume perception-rea

Q: 10 vision is travelling at a speed of 65 kmph on a freeway. A person with a normal vision of 20 10…

A:

Q: A car is traveling up a 1.5% grade at 65 mi/hr on good, wet pavement. The driver brakes to try to…

A: Given; Grade: 1.5% (or 0.015 as a decimal) Initial speed: 65 mi/hr Reaction time: 1.5 seconds…

Q: A car is driving at 75 mph down a 4.0% grade on poor, wet pavement. The car's braking efficiency is…

A: velocity of car(v)=75mph=gradient of road(n)=4%=0.04(downward)breaking efficiencydistance of…

Q: 2. A vehicle (SUV) is to overtake a bus as it enters an acceleration lane. The speed of the SUV is…

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Q: A distracted driver is travelling at 65mph on a roadway with an upgrade of 4% before he finally…

A: Given, Initial speed, Vi = 65 mph or 95.33 ft/s Grade, G = 4% or 0.04 Rolling resistance factor, frl…

Q: A car braked with a constant deceleration of 16 ft/sec^2, producing skid marks measuring 200 ft…

A: ASKED: To determine the speed of the car before the application of brakes.   Given, Constant…

Q: Cars are traveling on level terrain at 64 mph on a road with a coefficient o sion of 0.8. The driver…

A: Give data Velocity of car = 64 mph or miles/hr  Coefficient of adhesion = 0.8  Reaction time of…

Q: One of the two motor vehicles is moving up the ramp at 90 km / h on a road with a slope of 3%, the…

A: It is required to find the shortest distance to avoid collision by breaking.

Q: A driver is traveling 70 mi/hr on a road with a -2% downgrade. The driver's vehicle has a braking…

A: speed V = 70 mi/hr Grade G = -2% braking efficiency = 90% Stopping sight distance = 500 ft lateral…

Q: Car A is traveling at a constant speed va - 127 km/h at a location where the speed limit is 100…

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Q: One vehicle is following another on a two lanes, two way highway at night, according to the rule of…

A: One car length of clearance Perception reaction time Coefficient of braking friction Length of…

Q: A vehicle travelling on two way two lane roadway with average speed (70.0) Km/hr., maneuver to pass…

A: Given data, Passing speed u = 70 kmph Time of initial maneuver t1 = 3.5 sec Average acceleration a =…

Q: What is the brake reaction distance (ft) when the design speed is 55 mph, assuming the AASHTO…

A: Given data : Speed V = 55 mph (miles per hour)  AASTHO recommends  perception reaction time = 2.5…

Q: 2.32 A driver is traveling at 52 mi/h on a wet road. An object is spotted on the road 415 ft ahead…

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Q: A driver with a reaction time of 2.0 second is driving downhill on a 2% grade when suddenly a cat…

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Q: A student trying to test the braking ability of her car determined that she needed 19.5 ft more to…

A: The given data is shown below: Distance=19.5 ftGrades=5% and 3.5%

Q: 2. A driver traveling down a 4% grade collides with a roadside object. The roadway has a posted…

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Q: Assume that traffic on a single-lane approach to a signalized intersection observes the…

A: The given data is: red time=60sec the jam density kj=180 veh/mile Vf=60 mph We know that, Capacity…

Q: 3. Drivers must slow from 70 mph to 40 mph to negotiate a severe curve on a rural highway. A warning…

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Q: Q4) A driver is travelling at 45 mph. He is 60m from a traffic light when he sees turn yellow. His…

A: Speed of the car = 45 mph reaction time = 0.5 s the distance of traffic light and vehicle = 60 m

Q: 2. The driver of a car, applied brakes and barely avoided hitting an obstacle on the road. The…

A: Skid length L=25 m, Speed V=55 km/h, Coefficient of friction f=0.5, Reaction time t=2.5 s, To Find-…

Q: Refer to the following illustration; veh#2 is driving with the speed of 60mph, following veh#1 whose…

A: Speed of vehicle 1, Speed of vehicle 2, Distance, Level grade.To find: Minimum distance between two…

Q: eeded 19.5 ft more to stop her car when driving downhill on a gment of 5% grade than when driving…

A: Given:- road segment of 5% grade  another segment=3.5% grade To find:- speed

Q: One driver is driving on a 3% upgrade roadway with an initial speed of 80 mph, assuming his…

A: G=3% upgradeInitial speed = 80 mph,Perception-reaction time = 2 secondsTo determine:(a) If the…

Q: A grab driver is traveling at 15 m/s when the traffic light /87 ft ahead suddenly turns red. The…

A: given data : velocity of driver = 15 m/s distance of traffic light = 239.87 meter duration of light…

Q: car is traveling up a 3% grade, with the speed of 85mph, on a road that has good, wet pavement. A…

A: Gradient = +3% Initial speed, vo = 85mph = [85 x 1.467] ft/sec Total distance covered in brake…

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 data, Speed of both cars A & B, V = 60 ft/s Reaction time for both cars A & B, t =…

Q: stopped in a distance of 16.1m. if the coefficient of friction between the tires and the road

A: Given data - Velocity (V)  = 50km/hr = 50×(5/18) = 13.88m/s Braking distance = 16.1 m Coefficient of…

Q: Two drivers each have a reaction time of 2.5 seconds. One is obeying a 90 km/h speed limit, and the…

A: Reaction time of both the observer = 2.5 sec Velocity of car ( obeying speed ) = 90 km/h Velocity of…

Q: The design speed of a multilane highway is 65 mi/h. Determine the following. Note: The term in the…

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Q: driver takes 3.2 seconds to react to a situation complex while driving at 55 miles/hour. How far the…

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Q: A car is approachin an intersection with velocity 35 mph. When the car is at a distance of 200 ft…

A: Given Data: Velicity= 35mph.Distance = 200ftDrivers reaction time = 1.5sGrade of the road surface…

Q: The car is traveling at a speed of 76 mi/hr as it approaches point A. Beginning at A, the car…

A: Given:- The speed of the car as it approaches point A = 76 mi/hr The car decelerates at a constant…

Q: What is the intersection sight distance (m) needed at a stop controlled intersection for a passenger…

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Q: A test driver’s perception-reaction time is being conducted on a special testing track with wet…

A: (1) Initial velocity of the car(2) Final velocity of the car(3) Visible distance(4) Coefficient of…

Q: A driver travelling at 55 mph sees a wall at a certain distance ahead. The driver applies the break…

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Q: The rated speed of a highway curve of 200 ft radius is 40 mph. If the coefficient of friction…

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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.