Example • A vehicle is driving at an initial velocity of 110 km/hr along a stretch of dry highway with a gradient of -4%. Determine the stopping distance horizontally (Ds) given that the driver's perception-reaction time was d = 1.5s
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- 3. Two cars A and B travelling in the same direction and stopped at a highway traffic sign. As the signal turns green car A accelerates at a constant rate of 1m/s2. Two seconds later the second car B accelerates at constant rate of 1.3m/s2. When will the second car B overtakes the first car A.(b) Consider a stop-controlled intersection between a major and a minor street shown in the figure below. Traffic on the major street is arriving in a random manner (Poisson distributed vehicle arrivals) and passes through the intersection unimpeded, without having to stop. Traffic on the minor street must wait at the stop sign and can enter the major street only when there is a minimum headway tm = 2.5 seconds (gap) in the major street. Suppose that the flow rate on the major street is Q= 200 vehicles per hour, and only one vehicle can enter the major street during each acceptable gap. Estimate the maximum number of vehicles per hour that can be accepted to the major street (which is also the capacity) of the minor street approach. Major Street Minor StreetA car was traveling at a speed of 50mph. The driver saw a road block 80 m ahead and stepped on the brake causing the car to decelerate uniformly at 10 m/?2. a.) Find the distance travelled by the car during perception reaction time.b.) Find the distance travelled by the car from the moment the driverstepped on the brake until the car stops.c.) Find the distance from the roadblock to the point where the car stopped. Assume perception reaction time is 2 seconds.
- A vehicle (SUV) is to overtake a bus as it enters an acceleration lane. The speed of the SUV is 80 kph initially. The bus is at the same speed as the SUV. Given the perception reaction time as 2.70 seconds and the average acceleration of the vehicle is 2.55 m/s2, solve the following: provide solution asap a. The distance (in ft) traversed during the perception and reaction time and during the initial acceleration to the point of encroachment on the left lane.b. The distance (in yard) travelled by the passing vehicle occupies the left lane if the opposing vehicle travelled at 75 kph and the time for the passing vehicle to occupy the left lane is 20 seconds. c. The minimum passing sight distance (in m) if the SUV's velocity to overtake the bus is 55.92 miles per hour while the distance between the opposing vehicle and the SUV after its !PAnguygt is 295 ft. The time for the SUV to occupy the left lane is 0.23 minutes. d. The passing sight distance (in furlong) that the SUV could move…The length of the road stretch taken for conducting moving observer experiment is 0.4 km. Time taken by the observer to move with the traffic is 5 sec and the number of vehicles moving with test vehicle in the same direction is 10. Flow is 10 veh/sec. What is the mean speed?Situation 1: The travel times for five vehicles travelling a 200-m segment of a highway were observed as follows: Vehicle Time (seconds) A 12.07 В 10.84 11.97 9.75 D E 1. Determine the density of traffic in veh/km 2. Determine the team mean speed in kph 3. Determine space mean speed in kph 12.11
- 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-reaction time is 2.0 seconds)? How far was she from the truck at the moment the brakes were applied (use a/g=0.35)?One lane of 2-lane carriage of a highway is closed for repairs, the free flow speed in the 2-lane portion of highway is 70 km/hr ,the observation showed that the free flow speed in the bottleneck section is also 70 km/hr. the space head way of vehicles in stationary condition is 10 m. if the traffic volume is 2000 veh/hr. find the following? (assume linear relationship between speed and density). The mean speed of the traffic immediately before bottleneck section. The mean speed of the traffic at a distance clear from the influence of bottleneck. Find the queue length of vehicles after 30 minutes from the beginning of repair operation.Current Attempt in Progress A car is traveling around a circular track of 670-ft radius. If the magnitude of its total acceleration is 6.1 ft/sec² at the instant when its speed is 33 mi/hr, determine the rate at at which the car is changing its speed. Answer: at = ±i eTextbook and Media ft/sec²
- WA driver is travelling at 60 kph on asphalt road. An object is stopped on the road 264 ft a head and the driver is able to come to stop just before hitting the object. Determine the gradient of the road if you know that the driver reacted and prepared after 2.85 sec who saw the object.10 vision is travelling at a speed of 65 kmph on a freeway. A person with a normal vision of 20 10 can read one inch sign from 5 m. If- 10 10 vision driver 20 A driver with an average was decelerating at a rate of 2.5 m/s2 and the reaction time was 2.5 sec, then he will stop the vehicle after crossing the 5 inch letter sign board at a distance ofA car was travelling at a speed of 76 kph. The driver saw a roadblock 81 m ahead and stepped on the brake causing the car to decelerate uniformly at 10.3 m/s2. Assuming perception reaction time is 2.5 sec, determine the distance from the roadblock to the point where the car will stop in meters. (Answer must be in 3 decimal places)