1. From the following data of freeway surveillance, there are 5 vehicles counted for a length of 300 m, and the followingpositions are observed on the two photographs taken 2 seconds apart, the distance "S" that each vehicle travels. (a)Compute the density of flow in veh/km (b) Compute the space mean speed in kph, and (c) Compute the flow of traffic invehicles/hour.VehiclesPosition 1Position 2S (m)1268.3 m292.7 m215.4 m234.2 m3175.0 m199.7 m4143.2 m170.1 m95.20 m118.1 m2. Data obtained from aerial photography showed six vehicles on a 600 ft - long section of road. Traffic data collected at thesame time indicated an average time headway of 4 sec. Determine (a) the density on the highway, (b) the flow on the road,and (c) the space mean speed.Ans. k = 52.8 veh/mi, q = 900 veh/h, SMS = 17.0 mi/h3. Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 1500 ft apart. Observations at xxshow that five vehicles passed that section at intervals of 3, 4, 3, and 5 sec, respectively. If the speeds of the vehicles were50, 45, 40, 35, and 30 mi/h, respectively, draw a schematic showing the locations of the vehicles 20 sec after the firstvehicles passed section xx. Also, determine (a) the time mean speed, (b) the space mean speed, and (c) the density on thehighway.Ans. TMS = 40 mi/h, SMS = 38.7 mi/h, k = 31.0 veh/mi

time interval t=2.0 sec vehicle position 1 position 2 Distance S (in m) velocity v ( in…

1. From the following data of freeway surveillance, there are 5 vehicles counted for a length of 300 m, and the following positions are observed on the two photographs taken 2 seconds apart, the distance "S" that each vehicle travels. (a) Compute the density of flow in veh/km (b) Compute the space mean speed in kph, and (c) Compute the flow of traffic in vehicles/hour. Vehicles Position 1 Position 2 S (m) 1 268.3 m 292.7 m 215.4 m 234.2 m 175.0 m 199.7 m 143.2 m 170.1 m 5 95.20 m 118.1 m

1. From the following data of freeway surveillance, there are 5 vehicles counted for a length of 300 m, and the following positions are observed on the two photographs taken 2 seconds apart, the distance "S" that each vehicle travels. (a) Compute the density of flow in veh/km (b) Compute the space mean speed in kph, and (c) Compute the flow of traffic in vehicles/hour. Vehicles Position 1 Position 2 S (m) 1 268.3 m 292.7 m 215.4 m 234.2 m 175.0 m 199.7 m 143.2 m 170.1 m 5 95.20 m 118.1 m

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter4: Traffic Engineering Studies

Section: Chapter Questions

Problem 3P

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From the following data of a freeway surveillance, there are 5 vehicles traveling distances "S" when observed on the two photographs taken every 2 seconds apart. VEHICLES "S" (in meters) 1 2 3 4 5 24.4 18.8 24.7 26.9 22.6 5] Determine the space mean speed (in kph). 6] Determine the flow of traffic (veh/hr). 7] Determine the density of traffic (veh/km).
Consider the following data: · Average number of vehicles (overtaking - overtaken) = 1 • Average number of vehicles during trips in opposite direction of traffic flow = 336 · Average journey time when test vehicle is travelling with the stream = 8 min 31 sec. · Average journey time when test vehicle is travelling against the stream = 7 min 24 sec. Average journey time for the above data is min. %3D
from the following data of a freeway surveillance, there are 5 vehicles traveling distances "S" when observed on the two photographs taken every 2 seconds apart. Vehicles “S" (meters) 1 24.4 2 18.8 3 24.7 4 26.9 5 22.6 Determine the flow of traffic. Group of answer choices 8000 yph. 8500 yph 9000 yph 9500 yph.
Determine the density (in veh/mi) of a traffic stream comprised mainly of passenger cars, for which a 6-ft long detector measured an occupancy of 17%. Assume an average vehicle length of 18 ft. A. 37.4 B 41.3 C 49.9 D Insufficient information is provided. E None of the above
Question 2: Traffic data has been collected by students at two sections, xx and yy, of a high way 500 m apart. Observations at xx show that six vehicles passed that section at intervals of 10, 6, 7, 7, and 5 seconds, respectively. If the speeds of the vehicles were found to be 50, 45, 45, 40, 35, and 40 km/h, respectively. Y 500 m Y 1. Draw a schematic showing the locations of the vehicles 36 s after the first vehicle passed section xx. 2. Determine the time mean speed. 3. Determine the space mean speed 4. Estimate the rate of flow on the highway
From the following data of a freeway surveillance, there are 4 vehicles counted for a length of 200 m and the following distances each had travelled when observed on the photographs taken every 3 seconds apart. Compute the following:i. Density of flow in vehicles per km (vpk). ii. Space mean speed in kph. iii. Flow rate, in vehicles per hour. SHOW COMPLETE SOLUTION. NEED ASAP. THNAK YOU
2. Data obtained from aerial photography showed six vehicles on a 600 ft – long section of road. Traffic data collected at the same time indicated an average time headway of 4 sec. Determine (a) the density on the highway, (b) the flow on the road, and (c) the space mean speed. Ans. k = 52.8 veh/mi, q = 900 veh/h, SMS = 17.0 mi/h
Two sets of students are collecting traffic data at two sections, xx and yy, of a highway 500 metre apart. Observations at xx show that five vehicles passed that section at intervals of 3, 4, 3, and 5 secs, respectively. If the speeds of the vehicles were 50, 45, 40, 35, and 30 km/hr., respectively, draw a schematic showing the locations of the vehicles 20 sec after the first vehicle passed section xx. Also determine (a) the time mean speed, (b) the space mean speed, and (c) the density on the highway.
solve the problem given in image. please solve it completely.
ANSWER 22 AND 23
3 During a traffic speed survey, the following observations were recorded when a vehicle passes a 50 m long road section XY. Vehicle Time of Passing X (seconds) Time of Passing Y (seconds) 1 4.5 5.8 6.1 6.3 7.5 23 4 5 2.0 3.5 4.0 4.5 5.5 Determine the following: (i) Average time mean speed (ii) Average space mean speed using the above data (iii) Also verify the results obtained in (ii) above using relationship between the time mean speed and space mean speed.
3. A vehicle platoon was observed over a distance of 1000 ft on a single lane of Oak Street. entering at point A and departing at point B. Vehicle Time at A Time at B (sec) (sec) 1 35 2 (a) Trajectories (b) Avg. Volume Density & Space Mean Speed 37 3 39 4 5 42 5 44 6. 8. 48 (a) Plot the trajectories of these six vehicles on graph paper and (b) calculate the aver- age volume, density. and speed for these six vehicles observed, assuming the first 10 sec- onds at A as the period of observation.