IMSA SIGNAL TECHNICIAN LEVEL 1 END OF
CHAPTER 2026 PRACTICE TEST QUESTIONS
AND DETAILED TRAFFIC CONTROL
BREAKDOWN FULL REVIEW
◉ 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
◉ 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
◉ 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
CHAPTER 2026 PRACTICE TEST QUESTIONS
AND DETAILED TRAFFIC CONTROL
BREAKDOWN FULL REVIEW
◉ 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
◉ 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
◉ 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
