IMSA Signal Technician Level 1 Questions
and Answers with 100% Complete Solutions
2025 | 2026
, lOMoAR cPSD| 47061011
IMSA Signal Technician Level 1 Questions and Answers
Which of the following is a definition for initial green time: CORRECT ANSWER: Minimum time that
the green indication must 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: CORRECT ANSWER: Yield point
Which of the following is NOT a common mode of operation for timing plans in a signal system:
CORRECT ANSWER: Y: Time of day
N: Traffic related
Y: Traffic Responsive
Y: Traffic adaptive
Two common terms to describe traffic signal supports and signal heads are: CORRECT ANSWER:
Rigid and free-swinging
In a single wire with a single point attachment configuration, the wire that supports the signal head is
called the: CORRECT ANSWER: Messenger wire
The two nominal diameter sizes for vehicular signal lenses are: CORRECT ANSWER: 8 in (200 mm)
and 12 in (300 mm)
The purpose for "louvers" is to: CORRECT ANSWER: Make signal visible from a specific lane
Which of the following types of conduit are used for traffic signals? CORRECT ANSWER: Rigid Steel
Conduit
High-Density Polyethylene (HDPE)
PVC Schedule 40
Traffic signal supports are NOT used to display the following items: CORRECT ANSWER: Y: Guide
signs
N: Advertisements
Y: Regulatory signs
Y: Overhead street sign names
Which of the following is a disadvantage of mast arms: CORRECT ANSWER: Large foundations
and Answers with 100% Complete Solutions
2025 | 2026
, lOMoAR cPSD| 47061011
IMSA Signal Technician Level 1 Questions and Answers
Which of the following is a definition for initial green time: CORRECT ANSWER: Minimum time that
the green indication must 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: CORRECT ANSWER: Yield point
Which of the following is NOT a common mode of operation for timing plans in a signal system:
CORRECT ANSWER: Y: Time of day
N: Traffic related
Y: Traffic Responsive
Y: Traffic adaptive
Two common terms to describe traffic signal supports and signal heads are: CORRECT ANSWER:
Rigid and free-swinging
In a single wire with a single point attachment configuration, the wire that supports the signal head is
called the: CORRECT ANSWER: Messenger wire
The two nominal diameter sizes for vehicular signal lenses are: CORRECT ANSWER: 8 in (200 mm)
and 12 in (300 mm)
The purpose for "louvers" is to: CORRECT ANSWER: Make signal visible from a specific lane
Which of the following types of conduit are used for traffic signals? CORRECT ANSWER: Rigid Steel
Conduit
High-Density Polyethylene (HDPE)
PVC Schedule 40
Traffic signal supports are NOT used to display the following items: CORRECT ANSWER: Y: Guide
signs
N: Advertisements
Y: Regulatory signs
Y: Overhead street sign names
Which of the following is a disadvantage of mast arms: CORRECT ANSWER: Large foundations
