Question

A 6 lane highway has a free flow speed of 65 mph, an observed density of 115 veh/mi/ln, and a jam density of 265 veh/mila. most nearly , what is the flow rate of the highway ?

Answer #1

A six-lane divided multilane highway (three lanes in each
direction) has a measured free-flow speed of 50 mi/h. It is on
mountainous terrain with a traffic stream consisting of 7% large
trucks and buses and 3% recreational vehicles. The driver
population adjustment in 0.92. One direction of the highway
currently operates at maximum LOS C conditions and it is known that
the highway has PHF=0.90.
1. Determine the hourly volume for these conditions.
2. How many vehicles can be added...

A 3-lane freeway drops a lane at location x=0 km. The maximum
flow per lane is 1,800 vph, the jam density per lane is 108 veh/km,
and the free flow speed is 100 km/hr. Assuming triangular
flow-density relation, determine the trip time that will hold from
x=-1 to x=+2 km under different types of traffic demand. Recognize
that the section under consideration is inhomogeneous and assume
that the bottleneck transition is much smaller than the length of
the section (3km);...

An 8-lane freeway has a peak hour volume of 2800 vehicles. One
particular 8-mile section of the freeway with free flow speed of
60.255 mph and a peak hour factor of 0.9. Seven percent (7%) of the
peak hour traffic is single unit trucks and three percent (3%) is
tractor trailers. Assume commuter drivers and rolling terrain.
Find service flow rate___ pc/ hr/ ln
level of service ____
density ____ veh / mile

At a particular point, the traffic density in a highway segment
goes from 50 vpm (vpm=veh/mile) to 150 vpm. Throughout its length,
the highway has a capacity of 2500 vph (vph=veh/hr) and a jam
density of 200 vpm. Assuming Greenshields model, answer the
following questions:
Is traffic in a congested or uncongested regime when the
density is at 50 vpm?
Is traffic in a congested or uncongested regime when the
density is at 150 vpm?
What is the traffic flow...

Traffic has ground to a halt on one direction of a six-lane
freeway (three-lanes in each direction). The state Department of
Transportation (DOT) reports that it observed from the state patrol
helicopter a density of the stopped traffic of 52.8 veh/lane/mi.
What would you expect that the average spacing of vehicles is?

A data set of traffic stream characteristics, such as space mean
speed (u: miles per hour), density (k: vehicles per mile) and
traffic flow rate (q: vehicles per hour), was collected for a
freeway lane. The data reveals a relationship between flow rate (q)
and density (k) as calibrated below:
q=66*(k-k^2/160)
Where, q = flow rate of the lane (vehicles per hour); k =
density of the lane (vehicles per mile). Answer the following
questions:
(1)Determine the free-flow space mean...

A northbound two-lane (one direction) segment of freeway
currently has a measured density of 32.0 pc/mi/ln and a measured
FFS of 65 mi/h. The peak-hour factor is 0.95, the traffic stream
contains 7% single-unit trucks and 3% tractor-trailer trucks. The
freeway segment is on a 3.5% upgrade that is ¾ of a mile long. With
the peak-hour factor unchanged, how many trucks (assuming the same
ST/TT split) can be added to the peak hour before capacity is
reached?

Robert is driving his convertible at the 65-mph speed limit. The
car's soft, elastic ragtop roof is in the "up," or closed position,
and the car's windows are closed. What will an observer most likely
see happening to Robert's ragtop roof as the observer watches
Robert's car move along the highway?
A. The roof will bow inward toward the interior of the car.
B. The roof will appear no differently than it would if the car
were at rest.
C....

A four-lane freeway (two lanes in each direction) has the
arrival flow rate of λ(t)=40-0.15t (with t in minutes and λ(t) in
vehicles per minute). At 7 am, an accident occurred in the
northbound and blocked both lanes. Twenty minutes later, one lane
was opened. At 7:40 am the accident was cleared and both lanes were
opened. The capacity of the highway is 2,200 vehicles per hour per
lane if not impacted by an accident. (Assuming D/D/1 queuing).
When did...

A company's free cash flow has been growing at 6 percent per
year and is expected to maintain that level of growth in the
future. Next year’s FCF is expected to be $12m. If the company’s
discount rate is 11 percent, what is its fair value (assuming no
other data are available)?:
a. $254.4m
b. $240m
c. $280m
d. Cannot be determined

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