1|Page
IMSA TRAFFIC SIGNAL TECHNICIAN 1 EXAM||
ACTUAL EXAM ALL QUESTIONS AND 100%
CORRECT ANSWERS ALREADY GRADED A+||
LATEST AND COMPLETE UPDATE 2025 WITH
VERIFIED SOLUTIONS|| GUARANTEED PASS!!!
IMSA - ANSWER: The International Municipal Signal Association (IMSA) is the
oldest known association of its kind in the world. The
organization originated in 1896 and counts Thomas A. Edison
and the Edison Electric Company among its esteemed
members. Today, IMSA certifies tens of thousands of
technicians and stands as the most regarded name in public
safety.
First recorded attempt of regulating traffic flow with a mechanical signal? (where,
when, who, how) - ANSWER: Where: London, England
When: 1868
Who: J.P. Knight, railway engineer
How: Featured rotating arms with symbols indicating stop and go
Pivotal milestone of traffic signal? (Where, when, who, how) - ANSWER: Where:
Salt Lake City
When: 1912
Who: Lester Wire, Salt Lake City policeman
How: First electric traffic signal with red and green lights and buzzer to guide
vehicles
,2|Page
Significant breakthrough of traffic signal (Where, when, who, how) - ANSWER:
Where: Detroit
When: 1920
Who: William Potts, Detroit police officer
How: Introduced concept of amber (yellow) light, adding a crucial buffer
Garrett Augustus Morgan - ANSWER: African American inventor, invented three
position signal to add a warning position (1923, patented). Also invented a gas
mask to protect firefighters
NEMA - ANSWER: National Electrical Manufacturers Association - Founded in
1926, neutral forum of members made up of business leaders, electrical experts,
engineers, scientists, technicians. ANSI-accredited Standards Developing
Organization
IMSA - ANSWER: International Municipal Signal Association
NESC - ANSWER: National Electrical Safety Code - general requirements, safety
rules for installation and maintenance of electric supply stations, equipment,
communication lines, etc
CALTRANS/170 - ANSWER: California Dept. of Transportation
ITE - ANSWER: Institute of Transportation Engineers
ATCC - ANSWER: Advanced Transportation Controller Cabinet
ATC - ANSWER: Advanced Transportation Controller
, 3|Page
SDS - ANSWER: Safety Data Sheets
Purpose of Safety Data Sheets - ANSWER: Offer safety information for chemicals
you may use in your work environment, 16 sections, UN adopted Globally
Harmonized System of Classification of Labeling & chemicals in 2003
NEC - ANSWER: National Electrical Code Handbook - provides detailed
interpretations etc to accompany the National Electric Code. Published by NFPA -
National Fire Protection Association
Which document determines the hierarchy of utilities on a utility pole? -
ANSWER: NESC
Part 4 of the ____ determines all guidance for traffic signals? - ANSWER:
MUTCD
What does OSHA stand for? - ANSWER: Occupational Safety and Health
Administration
Who published the NEC? - ANSWER: National Fire Protection Association
3 common causes of accidents - ANSWER: 1) Driver mistakes or distractions
2) Failures or malfunction sin vehicle equipment
3) Adverse weather conditions
Negligence - ANSWER: Failure to exercise a reasonable standard of care
IMSA TRAFFIC SIGNAL TECHNICIAN 1 EXAM||
ACTUAL EXAM ALL QUESTIONS AND 100%
CORRECT ANSWERS ALREADY GRADED A+||
LATEST AND COMPLETE UPDATE 2025 WITH
VERIFIED SOLUTIONS|| GUARANTEED PASS!!!
IMSA - ANSWER: The International Municipal Signal Association (IMSA) is the
oldest known association of its kind in the world. The
organization originated in 1896 and counts Thomas A. Edison
and the Edison Electric Company among its esteemed
members. Today, IMSA certifies tens of thousands of
technicians and stands as the most regarded name in public
safety.
First recorded attempt of regulating traffic flow with a mechanical signal? (where,
when, who, how) - ANSWER: Where: London, England
When: 1868
Who: J.P. Knight, railway engineer
How: Featured rotating arms with symbols indicating stop and go
Pivotal milestone of traffic signal? (Where, when, who, how) - ANSWER: Where:
Salt Lake City
When: 1912
Who: Lester Wire, Salt Lake City policeman
How: First electric traffic signal with red and green lights and buzzer to guide
vehicles
,2|Page
Significant breakthrough of traffic signal (Where, when, who, how) - ANSWER:
Where: Detroit
When: 1920
Who: William Potts, Detroit police officer
How: Introduced concept of amber (yellow) light, adding a crucial buffer
Garrett Augustus Morgan - ANSWER: African American inventor, invented three
position signal to add a warning position (1923, patented). Also invented a gas
mask to protect firefighters
NEMA - ANSWER: National Electrical Manufacturers Association - Founded in
1926, neutral forum of members made up of business leaders, electrical experts,
engineers, scientists, technicians. ANSI-accredited Standards Developing
Organization
IMSA - ANSWER: International Municipal Signal Association
NESC - ANSWER: National Electrical Safety Code - general requirements, safety
rules for installation and maintenance of electric supply stations, equipment,
communication lines, etc
CALTRANS/170 - ANSWER: California Dept. of Transportation
ITE - ANSWER: Institute of Transportation Engineers
ATCC - ANSWER: Advanced Transportation Controller Cabinet
ATC - ANSWER: Advanced Transportation Controller
, 3|Page
SDS - ANSWER: Safety Data Sheets
Purpose of Safety Data Sheets - ANSWER: Offer safety information for chemicals
you may use in your work environment, 16 sections, UN adopted Globally
Harmonized System of Classification of Labeling & chemicals in 2003
NEC - ANSWER: National Electrical Code Handbook - provides detailed
interpretations etc to accompany the National Electric Code. Published by NFPA -
National Fire Protection Association
Which document determines the hierarchy of utilities on a utility pole? -
ANSWER: NESC
Part 4 of the ____ determines all guidance for traffic signals? - ANSWER:
MUTCD
What does OSHA stand for? - ANSWER: Occupational Safety and Health
Administration
Who published the NEC? - ANSWER: National Fire Protection Association
3 common causes of accidents - ANSWER: 1) Driver mistakes or distractions
2) Failures or malfunction sin vehicle equipment
3) Adverse weather conditions
Negligence - ANSWER: Failure to exercise a reasonable standard of care
