Question

An 8-lane freeway has a peak hour volume of 2800 vehicles. One particular 8-mile section of the freeway has five (5) interchanges (ramps), 11-foot lane widths, a right lateral clearance of 2 feet, and a peak hour factor of 0.9. Calculate the free flow speed.

Answer #1

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

An eight-lane freeway (four lanes in each direction) is on
rolling terrain and has 11-ft lanes with a 4-ft right-side
shoulder. The total ramp density is 1.5 ramps per mile. The
directional peak-hour traffic volume is 5400 vehicles with 11%
heavy vehicles. The peak-hour factor is 0.95. It has been decided
that heavy vehicles will be banned from the freeway during the peak
hour. What will the freeway’s density and level of service ben
before and after the ban? (Assume...

A segment of four-lane freeway (two lanes in each direction) has
a 3% upgrade that is 450 m long followed by a 300-m 4% upgrade. It
has 3.6 m lanes and 0.9 m shoulders. The directional hourly traffic
flow is 2000 vehicles with 5% large trucks and buses (no
recreational vehicles). The total ramp density for this freeway
segment is 1.45 ramps per kilometer. If the peak hour factor is 0.9
and all of the drivers are regular users, what...

A six- lane freeway (three lanes in each direction) in a scenic
area has a measured free- flow speed of 55 mi/ h. The peak- hour
factor is 0.80, and there are 7% SUTs and 3% TTs in the traffic
stream. One upgrade is 4.5% and 1.5 mi long. Free-flow speed is 70
mph. If the peak- hour traffic volume is 3900 vehicles, determine
level of service?

A segment of four-lane freeway (two lanes in each direction) has
a 3% upgrade that is 1500 ft long followed by a 1000-ft 4% upgrade.
It has 12-ft lanes and 3-ft shoulders. The directional hourly
traffic flow is 2000 vehicles with 3% SUTs and 3% TTs. The total
ramp density for this freeway segment is 2.33 ramps per mile. if
the peak-hour factor is 0.90, what is the level of service of this
compound-grade freeway segment?

A segment of four-lane freeway (two lanes in each direction) has
a 3% upgrade that is 1500 ft long followed by a 1000-ft 4% upgrade.
It has 12-ft lanes and 3-ft shoulders. The directional hourly
traffic flow is 2000 vehicles with 3% SUTs and 3% TTs. The total
ramp density for this freeway segment is 2.33 ramps per mile. if
the peak-hour factor is 0.90, what is the level of service of this
compound-grade freeway segment?

A section of a freeway on rolling terrain has the following
properties: design hourly volume = 2500 vph, 10% trucks, 2% RVs,
PHF = 0.95, two lanes 12 ft wide each, 5 ft lateral clearance and 8
ramps in every 10 miles. Determine the Level of Service (LOS) of
the section according to the Highway Capacity Manual 2010.

A westbound section of freeway currently has three 12-ft wide
lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream
and downstream of the segment midpoint. It is on rolling terrain
with 10% heavy vehicles and is operating at capacity with a
peak-hour factor of 0.900. If the road is expanded to four 11-ft
lanes with a 2-ft right shoulder, and traffic after the expansion
is projected to increase by 10% with the same heavy vehicle
percentage and...

Given the following information of a divided multilane highway
section located in rolling terrain.
2 lanes per direction
Posted speed limit = 55 mi/h
2 access points per mile
Lane widths = 11 feet
Shoulder width (right side) = 5 feet
Shoulder width (left side) = 3 feet
PHF =0.80
Directional peak hour volume =2000 vehicles with 7% single-unit
trucks and 3 %
tractor-trailer trucks.
Determine the level of service.

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?

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