Traffic Signal Technician Level 1

What is the primary function of the IMAS?

Safety Education

IMSA Stands for

International Municipal Signal Association

Which of the following is NOT an IMSA certification?

Traffic Signal Level III Bridge Technician

Which of the following are potential safety hazards?

overhead and underground power, gas, aerial lift equipment. Tra

What are the sections of a ramp mete signal

Circular red, circular green

PPE stands for

Personal Protective Equipment

A work zone supervisor is responsible for which of the following tasks:

Ensure advance warning devices have not been removed or relocated.

Which of the following is NOT a sentence type in the MUTCD?

Standards; requirement that have to be followed.

Guidance; recommendations that are to be followed unless there I good reason not to.

Objectives; reasons behind the standards and guidance.

Support; additional information to clarify the standards and guidance.

Objectives; reasons behind the standards and guidance

Which of the following is an example configuration fo an Emergency - Vehicle Traffic Control Signals?

Thee section traffic signal with circular red, circular yellow, and smaller circular yellow indications.

The following phases are typically assigned to the major-street through movements:

2 and 6

There green interval is made up of which three components?

Minimum green, passage time, maximum green

What are the three typical types of recall features of a traffic signal controller?

Minimum, Maximum, Pedestrian

In a coordination plan, what is the number of seconds given to each phase at the intersection?

split

which of the following traffic signal coordination methods is typically the least expensive?

Time-Based Coordination

Which of the following is a definition for cycle length?

The elapsed time between the start of a specific display until that display comes up again.

Which of the following is a characteristic of sequential phases?

they cannot occur at the same time.

Which of th following is a definition for initial green time

Minimum time that that the green indication myst be displayed

The only point in the cycle of a coordinated traffic signal controller where the major street phase is allowed to end is called

Yield point

Which of ht following is NOT a common mode of operation for timing plans in a signal system?

Traffic Related

Two common terms to describe traffic signal supports and signal heads are

rigid and free-swinging

IN a single wire with. single point attachment configuration, the wire that supports the signal heads is called the

Messenger Wire

The two nominal diameter sizes for vehicular signal lenses are:

8 in (200mm) and 12 in (300mm)

The purpose of "Louvers" is to:

make signal visible from a specific lane

Which of the following types of conduit are used for traffic signals?

Rigid Steel conduit

High-density Polyethylene (HDPE)

PVC Schedule 40

Traffic signal supports are NOT used to display the following items:

Advertisements

Which of the following is a disadvantage of mast arms:

Large Foundation

Loop detectors operate on the principle of:

inductance

The piece of cable that connects the controller cabinet to the loops is called a:

Lead-in-cable

The outer jacket of loop lead-in cable is typically made of:

Polyethylene

What is and advantage of video detection systems?

Images can sent to remote locations

Which of the following is a type of microwave detector:

frequency-modulated continuous wave (FMCW)

A 6' x 60' loop typically has how many turns of wire:

two

The primary function of the CMU is:

prevent conflicting signal indications

What is NOT part of an overhead power service:

Pull box or boxes

Typical back-up battery systems provide battery power in case of an outage to a signal for:

2 to 6 hours

A major distinguishing feature between NEMA TS-1 and TS-2 controllers is:

Data bus

The advanced transportation controller was developed to provide:

Open architecture hardware and software platform

Which of the following type of controller assemblies, without adapters, can accept multiple software platforms and be utilized in all types fo cabinets:

2070 controller

What is another term for load switches used in 170/2070 controllers?

switch packs

Which type of controller was introduced to supersede the 170 controller?

2070 controller

the NEMA TS-2 standards cover the same items as the TS-1 standards but expand the requirements to include which of the following:

Treatment fo signal preemption

What is NOT part of an underground power service:

Conduit rise with weatherhead

Two common types of signal pole installations are

Direct buried and foundation

The first type of testing performed on a controller cabinet assembly is

bench test

the second type of test performed on a controller cabinet assembly is

field test

continuity is a type of test for

traffic signal conductors

the most labor intensive type of vehicle detection installation is

inductive loop detection

which of the following 'start-up' items need to be completed by the contractor prior to the physical construction of the traffic signal

Utilities notification and coordination,

public awareness as required by the agency, approval of traffic control plan.

Which of the following equipment is NOT typically seen at the construction site of a traffic signal?

grader to create level intersections

Free-swinging signal heads are located on which of the following support systems

span wires

Traffic signals can be installed:

after justification is determined through a warrant study

A traffic signal warrant study can determine the need of installation through all of the following except:

Traffic volumes that show insufficient gaps exist on the major street to allow minor street traffic to enter or cross an intersection.

Road users at an intersection submitting a sufficient number of requests for installation of a signal based on local requirements.

Pedestrian volumes indicate a need in order to allow safe crossing of a road

Historical crash data shows that a signal would potentially improve safety conditions

Road users at an intersection submitting a sufficient number of requests for installation of a signal based on local requirements

a plans preparation manual indicates information regarding:

Amount of detail, information, and proper format for traffic signal plans.

EEO participation requires the contractor to:

maintain a percentage of minority workers on the project.

What is the purpose of traffic signal inspection?

to provide a record of construction, to document results of tests, to verify installation meets the requirements of the plans and contract documents.

in case of the perceived need for a traffic signal to allow pedestrians to cross a roadway, pedestrian volume counts are typically performed for what time duration?

8 hours

which of the following does a traffic signal designer have to take into consideration when designing a signal?

signal phasing, utilities, cost

Which of the following ar considerations that should be taken into account when designing a new traffic signal?

types of preemption required, coordination with nearby traffic signals, traffic characteristics at the location.

Multimeters are used to check

resistance, voltage, current

What devise is used to measure the resistance or breakdown strength of conductor insulation:

megohmmeter

What device dos a technician use to troubleshoot existing loops already installed in the field:

loop analyzer

Resistance as expressed by Ohm's law is

R=E/I

Ohm's law is useful in the design and troubleshooting of circuits and describes the mathematical relationship of the following:

voltage, current, resistance.

The typical traffic signal controller assembly is powered by what type of electrical current:

120 volts of AC

The two types of traffic signal maintenance that are typically performed are:

Emergency and scheduled maintenance

an example of emergency maintenance is:

power outages/surges due to electrical storm

A good nice step procedure for troubleshooting is:

observe, identify, determine, correct, observe again

Which of the following is NOT typically a maintenance concern for traffic signal installations:

Lubrication

A Key component of documentation is:

Developing written procedures for documentation, developing checklists, developing field reports

Which of the following is a characteristic o a good field report:

clearly written, concise, describes actions taken.

Which of the following best describe traffic signal maintenance:

the repair or upkeep of the existing equipment and operations

Checking for inconsistent indications, local construction activities, and if the signal is in flashing mode, would be an example of which of the 4 steps in the troubleshooting procedure:

Observe

Crashes occur at signalized intersections due to:

driver error, vehicle equipment malfunction, roadway or traffic control device defects.

The best way to minimize the possibility of being named in a lawsuit is by:

keeping good records, strict adherence to established stands, providing comprehensive maintenance procedures.

negligence is defined as:

the failure to do something that a reasonable person would ordinarily do.

When dealing with the public a technician should:

avoid arguing

When dealing with the public a technician should not:

threaten anyone, use technical jargon

Some agencies have found the it is more cost efficient to replace the lamps:

on a regularly scheduled basis

Effective determination of the cause of a failure in a traffic signal is called:

troubleshooting

what is the 5 step troubleshooting procedure

1. observe

2 identify

3 determine

4 correct

5 observe again

What is as important as performing the maintenance itself?

documentation of emergency maintenance.

When should documentation of a failure begin?

when a failure is traffic signal is first reported.

a Circuit that is wired in series is one where:

the current goes through all of the electrical components of the circuit

a Circuit that is wired in Parallel is one where:

each component has its own direct path.

Circuits are wired in__________ and ___________

series and parallel

Ohm's law is a set of formulas that describe the mathematical relationship between:

Voltage (E), current (I), and resistance (R).

What is a load switch tester also known as?

Multi-switch tester

A Load switch tester or multi-switch tester is used to:

verify the correct operation of a load switch. The unit verified that the correct current outputs are within the acceptable range for operation.

Slot testers are available that:

plug into the cabinet detector card rack and enable the technician to measure voltage, continuity and or resistance for each internal connection in the cabinet.

A loop analyzer is a unit that:

a signal technician uses to troubleshoot existing loops and test newly installed loops

An ammeter or current probe is:

a device that measures the current flowing through a wire or circuit.

A multimeter can detect the:

resistance, voltage, or current of an electrical circuit.

In the case of significant underground utility congestion or of the presence of utilities with potentially catastrophic consequences if damaged, a ______________ is a good option.

soft-dig

The following are some of the items that need to be considered when determining the signal type:

What type of signal supports will be used, will pedestrian features be required, are there any unusual roadway geometric features that will need to be accommodated?

the typical tests for traffic signal conductors are:

functional such as the connection to the proper signal display, induced voltage, and continuity

The cabinet should be oriented such the the door opens away from the intersection, and in a position that gives the field technician the:

greatest possible view

Traffic signal supports that typically require some type of foundation include:

mast arm poles, steel strain poles, trusses, monotones, pedestal poles for vehicular signals, and pedestrian signal pedestals.

What NEMA TS-2 configuration has no downwards compatibility?

type 1

An electro-mechanical controller has a:

motor that rotates the mechanism.

Emergency responders have two type to signal activation which are:

manual and optical or acoustic activation.