Assume you are an observer standing at a point along a three lane roadway. All vehicles in lane 1 are traveling at 50 km/h, all vehicles in lane 2 are traveling at 75 km/h, and all vehicles in lane 3 are traveling at 100 km/h. There is also a constant spacing of 0.8 kilometer between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time mean speed and space mean speed for this traffic stream?

Assume you are an observer standing at a point along a three lane roadway. All vehicles in lane 1 are traveling at 50 km/h, all vehicles in lane 2 are traveling at 75 km/h, and all vehicles in lane 3 are traveling at 100 km/h. There is also a constant spacing of 0.8 kilometer between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time mean speed and space mean speed for this traffic stream?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter6: Fundamental Principles Of Traffic Flow

Section: Chapter Questions

Problem 16P

See similar textbooks

Similar questions

Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 48 kph, all vehicles in lane 2 are traveling at 72 kph, and all vehicles in lane 3 are traveling at 97 kph. There is also a constant spacing of 75 m between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space-mean speed for this traffic stream?
Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 48 kph, all vehicles in lane 2 are traveling at 72 kph, and all vehicles in lane 3 are traveling at 97 kph. There is also a constant spacing of 75 m between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space-mean speed for this traffic stream? thank you
Assume you are an observer standing at a point on a three lane race track. All vehicles in lane 1 are traveling at 50 mi/h, all vehicles in lane 2 are traveling at 65 mi/h, and all vehicles in lane 3 are traveling at 70 mi/h. There is a constant spacing of 0.25 mile. If you collect spot speed data for all vehicles that pass your observation point in one hour, what will the time-mean speed be for the traffic stream?
Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 30 mi/h, all vehicles in lane 2 are traveling at 45 mi/h, and all vehicles in lane 3 are traveling at 60 mi/h. There is also a constant spacing of 0.5 milebetween vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes, what will be the time-mean speed and space meanspeed for this traffic stream?
Imagine you are recording speed at a point along a three-laneroadway. All vehicles in lane 1 are traveling at 60 mi/h, all vehicles in lane 2 are traveling at 30 mi/h, and all vehicles in lane 3 are traveling at 45 mi/h. There is also a constant spacing of 3168 ft. between vehicles. If you collect spot speed data for all vehicles as they cross your observation point, for 60 minutes, what will be the time-mean speed and space mean speed for this traffic stream?
Assume you are an observer standing at a point along a three‐lane roadway. All vehicles in lane 1 are traveling at 30 mi/hr, all vehicles in lane 2 are traveling at 45 mi/hr, and all vehicles in lane 3 are traveling at 60 mi/hr. The spacing between vehicles in each lane is 0.5 mile. If you collect spot speed data for all vehicles as they cross your observation point for 2 hours, what will be the time‐mean speed and space‐mean speed for this traffic stream?
A traffic data has been collected on two points on a highway: Point A and Point B, 450m apart. Observations at Point A shows that five vehicles passed the location at intervals 5, 5, 3, and 3 sec respectively. The speed of the vehicles at point A are 61, 59, 70, 79, 55 km/hr respectively. Assume the speed is maintained until point B. What is the density, in veh/km.
Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1,200 ft apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were 55, 50, 45, 40, and 35 mi/h, respectively, determine the space mean speed (in km/h) for the data using the following equation where ut and us are in km/h. (Round your answer to at least three significant figures.) ut = 0.966us + (3.541 km/h) km/h Determine the space mean speed (in km/h) for the data using the following equation. (Round your answer to at least three significant figures.) us = n n 1 ui i=1 km/h Compare your answers and discuss the results.
Repeat the previous problem, only now the driver of car A is traveling at VA = 130 km/h as it passes P, but over the next 5 seconds, the car uniformly decelerates to the speed limit of 100 km /h, and after that the speed limit is maintained. If the motion of the police car P remains as described in the previous problem, determine the distance required for police officer to overtake car A. Ans. 330 m
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 )?
64. The density of traffic in a certain observation point on a highway was recorded to be 30 veh/km. If the space mean speed of the vehicle is 50 kph, how many vehicles will be passing every 30 seconds?
Two set of students are collecting traffic data at the two sections A and B 300 meters apart long a highway . Observation at A shows that 5 vehicles pass that section at intervals of 9 sec , 10 sec, 11 sec, 13 sec, and 15 sec respectively. If the speed of the vehicles were 84, 76, 68, 60 and 52 kph, compute the time mean spee (kph), space mean speed (kph), density of the highway