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Imsa traffic tech 1 Questions and answers
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Imsa traffic tech 1 Questions and answers
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Imsa traffic tech 1"Accessible pedestrian signals usually include a ? - questions and answers-Signal device that
feature audible and/or vibrio tactile indications of the walk interval
"Full visors "are used to ? - questions and answers-Encircle the entires signal lens and are
typically used in applications where signal displays need to be shielded because signal displays
facing in multiple directions have been combined in one assembly
"Monotube supports are typically used where ? - questions and answers-Very large
intersections where mast arms cannot reach out far enough to provide adequate coverage of
the intersection.
"Pedestrian detection " provides the means to inform the ____? - questions and answers-Traffic
signal controller of the presence of a person desiring to cross a leg of the intersection
"Span wire supports are made up of ? - questions and answers-Two or more poles that support
one or more wires to which traffic signal heads and their associated electrical cables are
attached
"Strain poles " are manufactured specifically to handle what ? - questions and answers-The
strain of the load experienced when the span wires and traffic signals are attached to them.
"Trusses are used at ? - questions and answers-Extremely large intersections that cannot be
reasonably serviced with either mast arms or span wire assemblies and in some cases where
even a Monotube support is not feasible or desired
"Tunnel visors " are used for ? - questions and answers-Applications where it is desirable to
prevent the signal indications from being seen by drivers on a conflicting approach
120 VAC (Volts Alternating Current) is capable of what ? - questions and answers-Serious or
fatal injury
2 foot by 6 foot loop might require how many turns? - questions and answers-5 turns
6foot by 20 foot loop might require how many turns? - questions and answers-3 turns
6foot by 60 foot loop might require how many turns? - questions and answers-Require 2 turns
A "mast arms signal supports" is an assembly that typically includes what? - questions and
answers-A concrete foundation, a steel upright pole and a steel" arms that is attached to the
upright pole.
,A new option for mid block pedestrian signals ? - questions and answers-"Pedestrian hybrid
beacon" sometimes called high intensity actuated crosswalk or hawk
A system of lane use control signals must be coordinated with each other because why? -
questions and answers-So that they are operated uniformity and consistently
Americans with disabilities act (ADA ) has developed Guidelines and standards for pedestrian
signals or crossing features and those are ? - questions and answers-pedestrian signals or
crossing features that provide persons with disabilities additional guidance or traversable
access to the pedestrian sign detection device so that they can successfully execute the
crossing
An intersection that has four through phases and four left turn faces is what ? - questions and
answers-Said to be in "eight phase intersection"
Back plates are typically made of ? - questions and answers-Aluminum or plastic material as the
traffic signal assembly
Beacons shall be installed and used only at? - questions and answers-And intersections to
control two or more directions of travel
Contributory negligence is ? - questions and answers-To conduct which falls below the standard
of care that a person is legally required to exercise for his own safety and this failure is
contributing cause to injury or damage that he suffered
Doppler microwave and FMCW have what in common ? - questions and answers-They can
detect volume, occupancy classification, and speed
Doppler microwave detector can only detect? - questions and answers-moving vehicles
traveling faster than a minimum sopes.
Doppler microwave detectors transmit what ? - questions and answers-Low energy microwave
radiation at a detection zone.
During times of the day when mainline Volumes are light the ramp meter signals are usually
turned on or off or neutral ? - questions and answers-Turn off ( dark mode )
Each beacon Signal face consist of one or more signal sections of a standard traffic signal face
with what. ? - questions and answers-(CIRCULAR YELLOW & CIRCULAR RED ) Single
indications in each single face
Effective determination of the cause of a failure in a traffic signal is called? - questions and
answers-Trouble shooting
, Electrical lines buried underground present the same potential for danger as overhead lines -
questions and answers-True
Emergency traffic Signals are " preempted" (turned on) when? - questions and answers-When
the emergency vehicles need access to major street
Emergency vehicle signals are usually located at where? - questions and answers-At or near
the exit of the fire station or other facility that houses emergency response vehicles
Equal employment opportunity is for what ? - questions and answers-Prohibits specific types of
job discrimination in certain workplaces ( US department of labor)
Flashing circular yellow beacon light are installed , but they_____ - questions and answers-Must
not face conflicting vechicular approaches
FMCW can detect ? - questions and answers-Vehicle presence ?
Frequency modulated continuous wave measures what ? - questions and answers-The range
from the detector to the vehicle to determine vehicle presence.
Hazardous underground utilities:
Works must be aware of what ? - questions and answers-Of the location of utilities that cannot
be readily seen, including what type they are and the potential for danger that they possess.
How are the signal cable attached to the "trusses support" ? - questions and answers-Typically
attached to the main tubes in assembly
How are the traffic signal attached to the truss assembly? - questions and answers-By either
brackets or hangers
How are the traffic signal head attached to the "Monotube support"? - questions and
answers-With brackets or hangers that are common to the industry
How do loop detectors operate on what ? - questions and answers-Inductive
How do push button locator tones help the blind find the push button ? - questions and
answers-They have a quiet tones that repeat once per second from the push button for the blind
How many legs does a T intersection have? - questions and answers-Three legs
How many legs does the signalized intersection have? - questions and answers-Four legs
(four-way intersections)
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