Question
In: Civil Engineering
TRP 631: HIGHWAY TRAFFIC OPERATIONS An existing six-lane divided multilane highway with a field-measured free-flow speed...
TRP 631: HIGHWAY TRAFFIC OPERATIONS
An existing six-lane divided multilane highway with a field-measured free-flow speed of 45 mi/h serves a peak-hour volume of 4,000 veh/h with 10% trucks (50% SUT, 50% TT). The PHF is 0.88. The highway has generally rolling terrain. What is the likely level of service of this segment? Good weather, no incidents, no work zones, and regular drivers may be assumed.
Solutions
Ally Wells answered 1 year agoRelated Solutions
An existing 2-lane (in each direction) multilane divided highway. The speed limit is 50 mi/h, the...
An existing 2-lane (in each direction) multilane divided
highway. The speed limit is 50 mi/h, the lanes are 11-ft wide and
lateral clearance is 2-ft. The peak hour volume is 1,800 veh/h in
one direction, there are 5% trucks, a PHF of 0.92, but 1 access
point per mile.
a) Determine the LOS during the peak hour.
b) Compare your result with the freeway in situation 1.
TRP 631: HIGHWAY TRAFFIC OPERATIONS An older four-lane freeway has the following characteristics: 11 ft lanes...
TRP 631: HIGHWAY TRAFFIC OPERATIONS
An older four-lane freeway has the following
characteristics:
11 ft lanes
No lateral clearance
4.5 ramps/mile
5% truck( standard mix)
Peak-hour factor = 0.90
Rolling Terrain
The present peak-hour demand on the facility is 2,100 veh/h, and
anticipated growth is expected to be 3% per year. What is the
present LOS? What is the expected LOS in 5 years? 10 years? 20
years?. To avoid breakdown (LOS F), when will substantial
improvements be needed to...
Traffic on a three-lane freeway observes a triangular flow-density relationship with free-flow speed vf=100km/h, capacity c=2000veh/h/lane,...
Traffic on a three-lane freeway observes a triangular
flow-density relationship with free-flow speed
vf=100km/h, capacity c=2000veh/h/lane,
jam density kj=150veh/km/lane. Flow in the
freeway from upstream is 5000veh/h, while the ramp flow is
negligible (almost zero).At 9:45am, an accident occurs at point A.
The vehicles involved close one lane of traffic (total capacity
reduces to 4000veh/h) for 15min and afterwards the scene is clear
(capacity returns to 6000veh/h). Lucy enters the freeway via the
ramp at point B at 10:00am. Distance...
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...
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