IMSA Traffic Control Tech 1 IMSA Certification Questions
and Answers
Bonding and grounding Correct Ans-Joining metallic parts and using them to provide an
electrically conductive path to the ground
Phases Correct Ans-Through phases are typically even numbered and left turn phases are
odd numbered. Phases 1- 2- 5- 6 are the main street, while 3 -4 - 7 -8 are the side street
Concurrent group Correct Ans-phases that are grouped on the same street. phases usually
turn on with the the others in their group. divided by barrier, e.g main street/ side street
Ring Correct Ans-identifies phases that may operate one after another. organizing
conflicting phases such as a left turn not being on while through is on the opposite way.
Barrier Correct Ans-Separates opposing phases to avoid conflicting movements at the
same time. Also helps in rings relationship
Protected Phases Correct Ans-Provide exclusive right-of-way to a specific movement,
allowing passage with no conflicting traffic
,IMSA Traffic Control Tech 1 IMSA Certification Questions
and Answers
Permissive Phases Correct Ans-Allow movement to proceed with caution when there is a
gap in conflicting traffic. Usually yielding or giving right of way to crossing traffic
Calculating signal intervals Correct Ans-Turning movement counts - data on traffic volume
Signal phasing- data on terrain
Minimum green time- time to clear intersection
Pedestrian clear time
Yellow & All-Red Intervals
Coordination & Optimization
Split Correct Ans-Allocation of time within a single cycle for a specific movement or phase.
it represent the duration or percentage
Offset Correct Ans-time difference between the initiation of signal phases or intersections
along a corridor. Effective offset can help reduce stops, improve travel times, enhance fuel
efficiency
, IMSA Traffic Control Tech 1 IMSA Certification Questions
and Answers
Lead Left-Turns Correct Ans-protected left-turn served prior to the complementary through
movement. most common
High-Traffic Areas Correct Ans-High-volume streets, such as arterials. Typically wide and
have multiple lanes of travel.
Low-Traffic Areas Correct Ans-Low-volume streets such as local streets or collector streets.
Typically narrow and have single lanes of travel.
Insulated Hand Tools Correct Ans-Tools with insulated handles, designed to protect from
electric shock when working with live electricity.
Insulated Mats/Blankets Correct Ans-Safe place to stand when working on electric
systrems
Circuit Breaker Finders Correct Ans-Tool that helps locate the appropriate circuit breaker or
fuse that controls the electrical supply to the area.
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