Traffic and Highway Engineering - With Mindtap
5th Edition
ISBN: 9781305360990
Author: Garber
Publisher: CENGAGE L
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Question
Chapter 3, Problem 12P
To determine
The time taken by the driver to accelerate the vehicle from 40 mi/h to 45 mi/h.
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You are designing an on-ramp that connects an intersection (controlled by a signal) and the highway. You want to assure that vehicles that are completely stopped at the intersection can reach the prevalent highway speed, which is assumed to be 60mph. Assume that passengers have the maximum acceleration rate of 10 ft/sec2 , trucks have smaller acceleration rate 3.2 ft/sec2 . You can assume that vehicles can use the maximum acceleration rate regardless of the speed. What’s the reasonable length for the ramp?
Answer all the problems pls
3. Flow on a road is q1=1800veh/hr/lane, and density is kl=14.4 veh/km/lane. To reduce
speeding on a section of highway, a police cruiser decides to implement a rolling
roadblock, and to travel in the left lane at the speed limit (v2=88km/hr) for 10 km. This
ensures that no overtaking is done by the vehicles in this platoon. After the police cruiser
joins, the platoon density increases to 20 veh/km/lane and flow drops. Find:
(a) How many vehicles will be in the platoon when the police car leaves the highway
(b) How long it will take for the queue to dissipate
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Traffic and Highway Engineering - With Mindtap
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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
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- Two vehicles, one operated by a human and the other computer controlled, are traveling on a level highway. If the autonomous vehicle is traveling at 70 mi/h, and it receives information at a frequency of 10Hz to respond, what is the maximum speed the human-controlled vehicle can travel and have a practical stopping distance that does not exceed that of the autonomous vehicle? (Assume that grade is zero, driver’s reaction time is 1.5s and autonomous vehicle can decelerate at 15.5ft/s2 )?arrow_forwardA child accidentally runs into the street in front of an approaching vehicle. The vehicle is traveling at 40 mi/h. Assuming the road is level, at what distance must the driver see the child to stop just in time?arrow_forwardThe distance traveled by the vehicle in the opposite direction is 100 m on two lane two lane roadway. If the acceleration of overtaking vehicle is 3 km/h/sec and time of initial manoeuver is 4 sec. thus the safe overtaking vehicle speed rounded to integer number is ..........km/harrow_forward
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