IMSA #2
A traffic cycle / (cycle length) definition is ? - answer Is the total elapsed Time between
the start of a specific display until the display comes up again.
Example ( if the cycle starts at the beginning of a green display it will end when The
same green display begins again after the red and yellow displays have been given.
The acronym AWG stands for what? - answer American wire gauge
Americans with disabilities act of 1990 (ADA) is? - answer Requirements ensuring equal
opportunity for persons with disabilities and employment, state and local government
services, Public accommodations, commercial facilities and transportation
The acronym (CMS) stands for what? - answer Changeable message sign
Changeable message sign is for what? - answer Also known as variable message sign
(VMS) and dynamic message sign (DMS) CMS are traffic control devices used for traffic
warning, regulation, routing and management, and are designed to affect the behavior
of motorist ( thus improve the flow of traffic) by providing real time highway related
information
What is a (Beacon)? - answer A highway traffic signal with one or more signal sections
that operates in a flashing mode.
The acronym (ITS) stands for what? - answer Intelligent transportation systems
intelligent transportation systems (ITS) what does it do? - answerImproves
transportation safety and mobility and enhances productivity through the use of
advanced information and communications technologies. ITS encompass a broad range
wireless and wire line communications based information and electronics technologies
(ITS)
What is a (major street) ? - answerThe street normally carrying the higher volume of
vehicular traffic
The acronym (MMU)stands for ? - answerMalfunction Management Unit
Malfunction management unit is ? - answerA device used to continually check for the
presence of conflicting signal indications and other malfunctions and to provide an
output response to conflict or malfunction. MMU is an advance type of conflict monitor
that also communicates and monitors controller function.
,What is a minor street? - answerThat street normally carrying lower volume of vehicular
traffic
What is "offset" - answerThe time difference, or interval in seconds or percentage of
cycle length between the start of the green indication of the coordinated phase and the
system reference signal
What is a "platoon" - answerA group of vehicles or pedestrians traveling together as a
group, either voluntarily or involuntarily, because of traffic signal controls ,geometrical or
other factors
What is a "preemption control"? - answerThe transfer of normal operation of a traffic
control signal to a special control mode of operation.
What is a "Queue length "? - answerNumber of vehicles stopped or slowly moving in a
line, where the movement of each vehicle is constrained by that of the lead vehicle
What is a "signal warrant? - answerA threshold condition that, if found to be satisfied as
part of an engineering study, shall results in analysis of other traffic conditions or factors
to determine whether a traffic control signal or other equipment is justified
Which certification has level II and Level III ? - answerTraffic signal level II bench
Traffic signal level II construction
Traffic signal level II design
Traffic signal level II field
Traffic signal level III Bench
Traffic signal level III Electrician (field)
(Traffic signal phase )is ? - answerSpecific assigned timing function in the traffic signal
controller.
Are phases numbered 1 -8 ? True or false ? - answerTrue
Even number phases are typically assigned to what movements? - answerThrough
movements
Phases 2-6 are assigned to ? - answerMajor streets through movements
Odd numbers ( 1,3,5,7) phases are assigned to what? - answerLeft turn phases
An intersection that has four through phases and four left turn phases are considered
how may phases together ? - answerEight phase intersection
Each phase is comprised of intervals ?
True or false ? - answerTrue
,(Interval )is based on? - answerThe amount of TIME that a particular indication is given
during a phase
Another words, the total time assigned to a specific display.
An example of an ( interval ) is? - answer" the amount of time that a green indication is
given during a particular phase. " (know as a "green _______ )"
(Ring) in a traffic signal controller is? - answerA Series of conflicting phases that occur
in simultaneously( same time ) with each other
What are the two typically ( ring ) that a traffic controller have ? - answer"Single-ring" or
"dual ring"
What are other ( rings ) that are rarely used ? And when are these types of rings used
for? - answer3 or 4 rings &
(used for two or more separate intersections are controlled by a single controller)
What is a ( barrier) ? - answerIs a boundary point in the preferred sequence. Barrier that
separates something so it won't have in the same time.
How many (barriers) does a "dual ring controller" have? - answerTwo , one for leaving
the MAJOR street and one for leaving the MINOR street.
_______ ensure that green indications will not be given to conflicting movement at the
intersection at the same time. - answerBarriers
What is a ( concurrent phase) ? - answerAre movements that happen at the same time
because do not conflict ( collide) with one another.
Example of a ( concurrent phase ) - answerA Through movement and a adjacent left
turn movement can move on the same time.
What is a (sequential phase)? - answerCannot happen at the same time because they
conflict with one another ( collide)
In a " sequential phases ? How many movements can it have? - answerOnly one phase
is served at a time
Traffic signal industry has developed basic standards that provide common terms snd
concept , but the most important thing is to have an understanding of your_______ -
answerLocal agency standards
What is (traffic signal timing)? - answerThe assignment of specific number of seconds
for each interval of each controller timing function.
, ________ are a more detailed assignment of specific portions of time within a phase. -
answerPhase intervals
phase intervals can be ? - answerGreen, yellow , red and pedestrian intervals
A green interval is ? - answerIs the total time assigned to the green indication for a
phase whether sequential or concurrent.
Minimum green or initial green time is? - answerIs the absolute minimum time that the
green indication must be displayed.
How many basic time components or "sections of time " does a green interval have that
equal the entire interval? - answerThree basic time components
Most agencies set a standard for a minimum green initial green time. For a left turn
face. How long should that minimum green be displayed for ? - answer3 to 7 seconds
Most agencies set a standard for a minimum green initial green time. For a minor street
through phase. How long should that minimum green be displayed for ? - answer5 to 15
seconds
Most agencies set a standard for a minimum green initial green time. For a major street
through phase . How long should that minimum green be displayed for ? - answer15 to
25 seconds
The common meaning for a passage time/ extension time/ gap extension is? - answerIs
the amount of time when a conflicting call is present that the controller will continue to
Display a green light after the last vehicle has been detected
What is the concept of a "passage time" and "extension time"? - answerMaking the time
long enough for a vehicle leaving the advance loop to get to a point where It will
continue through the intersection if the light turns yellow
"Gap extension" concept is? - answerMaking the time equal to the length of time
between vehicles that is high enough so that the green time is no longer being used in
thus it would be better to go to the next phase
Maximum green time is ? - answerThe highest amount of time that the green light can
be displayed when a Conflicting call is present
How is "maximum green times "for the various phases of the controller calculated ? -
answerIt's based on traffic volumes
The maximum times can vary during the different portions for a typical day, specially if
the controller as part of an area wide coordinated traffic signal system.. is this passage
true or false? - answerTrue
A traffic cycle / (cycle length) definition is ? - answer Is the total elapsed Time between
the start of a specific display until the display comes up again.
Example ( if the cycle starts at the beginning of a green display it will end when The
same green display begins again after the red and yellow displays have been given.
The acronym AWG stands for what? - answer American wire gauge
Americans with disabilities act of 1990 (ADA) is? - answer Requirements ensuring equal
opportunity for persons with disabilities and employment, state and local government
services, Public accommodations, commercial facilities and transportation
The acronym (CMS) stands for what? - answer Changeable message sign
Changeable message sign is for what? - answer Also known as variable message sign
(VMS) and dynamic message sign (DMS) CMS are traffic control devices used for traffic
warning, regulation, routing and management, and are designed to affect the behavior
of motorist ( thus improve the flow of traffic) by providing real time highway related
information
What is a (Beacon)? - answer A highway traffic signal with one or more signal sections
that operates in a flashing mode.
The acronym (ITS) stands for what? - answer Intelligent transportation systems
intelligent transportation systems (ITS) what does it do? - answerImproves
transportation safety and mobility and enhances productivity through the use of
advanced information and communications technologies. ITS encompass a broad range
wireless and wire line communications based information and electronics technologies
(ITS)
What is a (major street) ? - answerThe street normally carrying the higher volume of
vehicular traffic
The acronym (MMU)stands for ? - answerMalfunction Management Unit
Malfunction management unit is ? - answerA device used to continually check for the
presence of conflicting signal indications and other malfunctions and to provide an
output response to conflict or malfunction. MMU is an advance type of conflict monitor
that also communicates and monitors controller function.
,What is a minor street? - answerThat street normally carrying lower volume of vehicular
traffic
What is "offset" - answerThe time difference, or interval in seconds or percentage of
cycle length between the start of the green indication of the coordinated phase and the
system reference signal
What is a "platoon" - answerA group of vehicles or pedestrians traveling together as a
group, either voluntarily or involuntarily, because of traffic signal controls ,geometrical or
other factors
What is a "preemption control"? - answerThe transfer of normal operation of a traffic
control signal to a special control mode of operation.
What is a "Queue length "? - answerNumber of vehicles stopped or slowly moving in a
line, where the movement of each vehicle is constrained by that of the lead vehicle
What is a "signal warrant? - answerA threshold condition that, if found to be satisfied as
part of an engineering study, shall results in analysis of other traffic conditions or factors
to determine whether a traffic control signal or other equipment is justified
Which certification has level II and Level III ? - answerTraffic signal level II bench
Traffic signal level II construction
Traffic signal level II design
Traffic signal level II field
Traffic signal level III Bench
Traffic signal level III Electrician (field)
(Traffic signal phase )is ? - answerSpecific assigned timing function in the traffic signal
controller.
Are phases numbered 1 -8 ? True or false ? - answerTrue
Even number phases are typically assigned to what movements? - answerThrough
movements
Phases 2-6 are assigned to ? - answerMajor streets through movements
Odd numbers ( 1,3,5,7) phases are assigned to what? - answerLeft turn phases
An intersection that has four through phases and four left turn phases are considered
how may phases together ? - answerEight phase intersection
Each phase is comprised of intervals ?
True or false ? - answerTrue
,(Interval )is based on? - answerThe amount of TIME that a particular indication is given
during a phase
Another words, the total time assigned to a specific display.
An example of an ( interval ) is? - answer" the amount of time that a green indication is
given during a particular phase. " (know as a "green _______ )"
(Ring) in a traffic signal controller is? - answerA Series of conflicting phases that occur
in simultaneously( same time ) with each other
What are the two typically ( ring ) that a traffic controller have ? - answer"Single-ring" or
"dual ring"
What are other ( rings ) that are rarely used ? And when are these types of rings used
for? - answer3 or 4 rings &
(used for two or more separate intersections are controlled by a single controller)
What is a ( barrier) ? - answerIs a boundary point in the preferred sequence. Barrier that
separates something so it won't have in the same time.
How many (barriers) does a "dual ring controller" have? - answerTwo , one for leaving
the MAJOR street and one for leaving the MINOR street.
_______ ensure that green indications will not be given to conflicting movement at the
intersection at the same time. - answerBarriers
What is a ( concurrent phase) ? - answerAre movements that happen at the same time
because do not conflict ( collide) with one another.
Example of a ( concurrent phase ) - answerA Through movement and a adjacent left
turn movement can move on the same time.
What is a (sequential phase)? - answerCannot happen at the same time because they
conflict with one another ( collide)
In a " sequential phases ? How many movements can it have? - answerOnly one phase
is served at a time
Traffic signal industry has developed basic standards that provide common terms snd
concept , but the most important thing is to have an understanding of your_______ -
answerLocal agency standards
What is (traffic signal timing)? - answerThe assignment of specific number of seconds
for each interval of each controller timing function.
, ________ are a more detailed assignment of specific portions of time within a phase. -
answerPhase intervals
phase intervals can be ? - answerGreen, yellow , red and pedestrian intervals
A green interval is ? - answerIs the total time assigned to the green indication for a
phase whether sequential or concurrent.
Minimum green or initial green time is? - answerIs the absolute minimum time that the
green indication must be displayed.
How many basic time components or "sections of time " does a green interval have that
equal the entire interval? - answerThree basic time components
Most agencies set a standard for a minimum green initial green time. For a left turn
face. How long should that minimum green be displayed for ? - answer3 to 7 seconds
Most agencies set a standard for a minimum green initial green time. For a minor street
through phase. How long should that minimum green be displayed for ? - answer5 to 15
seconds
Most agencies set a standard for a minimum green initial green time. For a major street
through phase . How long should that minimum green be displayed for ? - answer15 to
25 seconds
The common meaning for a passage time/ extension time/ gap extension is? - answerIs
the amount of time when a conflicting call is present that the controller will continue to
Display a green light after the last vehicle has been detected
What is the concept of a "passage time" and "extension time"? - answerMaking the time
long enough for a vehicle leaving the advance loop to get to a point where It will
continue through the intersection if the light turns yellow
"Gap extension" concept is? - answerMaking the time equal to the length of time
between vehicles that is high enough so that the green time is no longer being used in
thus it would be better to go to the next phase
Maximum green time is ? - answerThe highest amount of time that the green light can
be displayed when a Conflicting call is present
How is "maximum green times "for the various phases of the controller calculated ? -
answerIt's based on traffic volumes
The maximum times can vary during the different portions for a typical day, specially if
the controller as part of an area wide coordinated traffic signal system.. is this passage
true or false? - answerTrue
