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IMSA Level 1 Certification Exam Questions and Answers: Traffic Signal Systems, Exams of Traffic Control and Regulation

University of Kentucky (UK)Traffic Control and Regulation

A comprehensive set of questions and answers for the imsa level 1 certification exam, focusing on traffic signal systems. It covers various aspects of traffic signal design, installation, and maintenance, including signal head types, loop detectors, and controller operation. Valuable for individuals preparing for the imsa level 1 certification exam or those seeking to gain a deeper understanding of traffic signal systems.

Typology: Exams

2024/2025

Available from 04/14/2025

tizian-kylan
tizian-kylan 🇺🇸

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IMSA
IMSA level 1 certification
IMSA level 1 certification Exam
Questions with Correct Verified
Solutions 2025/2026
1. What is the disadvantage of a span intersection? - ANS ✓Taller support
poles.
2. What is the disadvantage of mast arm supports? - ANS ✓Higher cost.
3. What is the minimum number is heads for Main Street direction? -
ANS ✓Must have a minimum of 2 signal heads.
4. 12" signal heads can be used without side a pole support heads on a
____ to a _____ intersection? - ANS ✓Minimum 40 foot maximum 120 foot
intersection.
5. The a.d.a of 1990 ensures no discrimination against people who have
disabilities? - ANS ✓True.
6. Are pull/ junction boxes only used where wire needs to change
direction? - ANS ✓No
7. What is used to shade signal indications from the sun and allow it be
seen from the lane intended? - ANS ✓Visors.
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Download IMSA Level 1 Certification Exam Questions and Answers: Traffic Signal Systems and more Exams Traffic Control and Regulation in PDF only on Docsity!

IMSA

IMSA level 1 certification Exam

Questions with Correct Verified

Solutions 2025/

  1. What is the disadvantage of a span intersection? - ANS ✓Taller support poles.
  2. What is the disadvantage of mast arm supports? - ANS ✓Higher cost.
  3. What is the minimum number is heads for Main Street direction? - ANS ✓Must have a minimum of 2 signal heads.
  4. 12" signal heads can be used without side a pole support heads on a ____ to a _____ intersection? - ANS ✓Minimum 40 foot maximum 120 foot intersection.
  5. The a.d.a of 1990 ensures no discrimination against people who have disabilities? - ANS ✓True.
  6. Are pull/ junction boxes only used where wire needs to change direction? - ANS ✓No
  7. What is used to shade signal indications from the sun and allow it be seen from the lane intended? - ANS ✓Visors.

IMSA

  1. Signal heads that are _________ to only be seen from a specific area on the road? - ANS ✓Visibility limited.
  2. ____ assemblies provide the maximum support length to cross over a street? - ANS ✓Truss type assemblies.
  3. You can use the same type signal head _______ on a mast arm and truss supports? - ANS ✓Mounting hardware.
  4. Long life and low power consumption is a major advantage for _____ lamps? - ANS ✓LEDs
  5. The ___ wire keeps signal heads from swinging in the wind? - ANS ✓tether
  6. Span conductor wires are exposed to the weather 24/7? T or f?
    • ANS ✓True
  7. __________ are used to warn the traveling public of any changes or work on the road ahead, they are also known as variable/dynamic message signs? - ANS ✓Changeable message signs
  8. The last step before an intersection is ready for ____ is to have the inspectors, local agencies, and the contractor meet for the final okay. - ANS ✓Stop and go operation
  9. What are the two indications on a ped head and their colors? - ANS ✓Walking man - white, upraised hand - Portland orange

IMSA

  1. What is the voltage that a traffic signal cabinet needs to run all its components? - ANS ✓120 volts AC
  2. Where are you when you come across a signal that has a ped pole on each side of the road, each having a 3 section signal on top followed with a 2 section mounted directly under neath? - ANS ✓A ramp meter on a ramp to a highway.
  3. What is a flashing signal along the road called? - ANS ✓A flashing beacon.
  4. What is the definition of short term work zone as per the MUTCD? - ANS ✓1 hour or less
  5. What's OSHA? - ANS ✓Occupational and safety health administration
  6. Can you get your level III certification and what are they? - ANS ✓Yes, and it's for bench and field electrician
  7. I'm working near power lines where would I get my clearance from? - ANS ✓CEC, NEC, NESC
  8. What are the three basic types of beacons? - ANS ✓Stop sign beacon, warning beacon, and flashing beacon.
  9. What is the difference between concurrent and sequential phases? - ANS ✓Concurrent phases, phases that run together. Sequential phases, are phases that run one at a time.

IMSA

  1. I have a dual ring controller and all my through phases are even, what do I mean? - ANS ✓The dual ring phases are 2,4,6,
  2. What is the cheapest way to coordinate a corridor of signals? What needs to stay the same throughout the day? - ANS ✓Time based coordination, and cycle length.
  3. Explain the white walking man, the flashing orange hand on a ped head and how is this time figured? - ANS ✓The white walking man is the ped head walk interval, and the ped change clearance interval is the flashing orange hand.
  4. What makes up the green interval? - ANS ✓Initial green time, passage/extension/gap time, and max green time.
  5. At most intersections what are phases 2,6 called, and phases 4,8 called - ANS ✓Phases 2,6 are called Main Street, and 4,8 are called side street.
  6. Name the three traffic signal systems? - ANS ✓Closed loop, central computer, hybrid systems.
  7. If phase 2 is in recall what will the controller do? - ANS ✓The controller will service that phase even if there is no need for it.
  8. What happens after the green interval and before the red interval, and how is this change interval figured? - ANS ✓Yellow interval, and is figured by using the approach speed of the traffic.