Question
In: Civil Engineering
A section of highway has the following flow-density relationship, where flow (q) is in veh/h and...
A section of highway has the following flow-density relationship, where flow (q) is in veh/h and density (k) is in veh/km. ? = 60? − 0.24? 2 What is the speed when the highway is at 50% of its capacity and the traffic is in uncongested conditions? [5 marks]
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Ally Wells answered 7 months agoRelated Solutions
An approach to a signalized intersection has a saturation flow rate of 1800 veh/h. At the...
An approach to a signalized intersection has a saturation flow
rate of 1800 veh/h. At the beginning of an effective red, there are
6 vehicles in queue and vehicles arrive at a rate of 900 veh/h. The
signal has a 60-second cycle with 25 seconds of effective red. What
is the total vehicle delay after one cycle?
Consider a freeway with two lanes and capacity of 2000 veh/h/lane, jam density of 60 veh/km/lane...
Consider a freeway with two lanes and capacity of 2000
veh/h/lane, jam density of 60 veh/km/lane and a triangular
fundamental diagram. Traffic is moving with the flow of 3000 veh/h
and the space mean speed of 100 km/h. At 10:00 a.m., a traffic
crash occurs that blocks one lane for half an hour. Using shockwave
analysis, answer the following questions. a. Draw the space-time
diagram with shockwaves and traffic states (trajectories not
needed). [2 marks] b. At time t =...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized.
y=B0+B1x+e
where
y= traffic flow in vehicles per hour
x= Vehicle speed in miles per hours
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow ()
Vehicle Speed ()
1255
35
1207
30
1365
50
1314
50
1247
35
1290
45
a. Develop an estimated regression equation for
the data.
The regression...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized.
y=b0+b1X+E
where
y= traffic flow of vehicles per hour
X= vehicle speed in miles per hour
The following data were collected during rush hour for six
highways leading out of the city.
Traffic flow(y)
vehicle speed(X)
1169
30
1134
40
1162
30
1223
35
1166
25
1285
40
a) the following Regression equation
y=___________+__________x (2 decimals)
b) use a=0.05 significance
s=________________ (4...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized:
y = β0 +
β1x + ε
where
y = traffic flow in vehicles per hour
x = vehicle speed in miles per hour.
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow
(y)
Vehicle Speed
(x)
1,258
35
1,331
40
1,226
30
1,336
45
1,350
50
1,125
25
In working further with...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been hypothesized:
y = β0 +
β1x + ε where
y = traffic flow in vehicles per hour
x = vehicle speed in miles per hour.
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow
(y)
Vehicle Speed
(x)
1,257
35
1,330
40
1,224
30
1,333
45
1,351
50
1,123
25
In working further with...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized:
y = β0 +
β1x + ε
where
y = traffic flow in vehicles per hour
x = vehicle speed in miles per hour.
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow
(y)
Vehicle Speed
(x)
1,255
35
1,328
40
1,228
30
1,336
45
1,347
50
1,124
25
In working further with...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized.
where y=b0+b1x+b2x2
y=traffic flow in vehicles per hour
x=vehicle speed in miles per hour
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow ()
Vehicle Speed ()
1257
36
1329
45
1226
35
1335
45
1349
55
1125
25
a. Use the data to compute the coefficients of
this estimated regression equation (to...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been hypothesized:
y = β0 +
β1x + ε
where
y = traffic flow in vehicles per hour
x = vehicle speed in miles per hour.
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow
(y)
Vehicle Speed
(x)
1,254
35
1,331
40
1,224
30
1,335
45
1,348
50
1,123
25
In working further with...
A highway department is studying the relationship between traffic flow and speed. The following model has...
A highway department is studying the relationship between
traffic flow and speed. The following model has been
hypothesized.
y = B 0 + B 1 x + B2x 2 +
E
where
y = traffic flow in vehicles per hour
x = vehicle speed in miles per hour
The following data were collected during rush hour for six
highways leading out of the city.
Traffic Flow
(y)
Vehicle Speed
(x)
1,256
35
1,329
45
1,226
30
1,335
50
1,349
55...
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