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What color are all transverse markings?
What color are all transverse markings?
Crosswalk markings should only be placed where there is a low conflict between vehicles and pedestrians.
Crosswalk markings should only be placed where there is a low conflict between vehicles and pedestrians.
False
What marking is often associated with the word 'SCHOOL'?
What marking is often associated with the word 'SCHOOL'?
School crossing zones
Object markers are used to denote __________ either in or adjacent to the traveled way.
Object markers are used to denote __________ either in or adjacent to the traveled way.
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Match the following types of object markers with their purposes:
Match the following types of object markers with their purposes:
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Which element is NOT included in parking space markings?
Which element is NOT included in parking space markings?
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What are directional arrows used for?
What are directional arrows used for?
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Parking space markings are categorized under longitudinal markings only.
Parking space markings are categorized under longitudinal markings only.
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Which Type of object marker consists of nine yellow retro reflectors?
Which Type of object marker consists of nine yellow retro reflectors?
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Warning signs are primarily used to inform road users of selected traffic laws or regulations.
Warning signs are primarily used to inform road users of selected traffic laws or regulations.
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What is the minimum size of a Type-2 object marker panel?
What is the minimum size of a Type-2 object marker panel?
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Regulatory signs usually have a background color of ______.
Regulatory signs usually have a background color of ______.
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Match the following Traffic Sign categories with their descriptions:
Match the following Traffic Sign categories with their descriptions:
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What angle do the black and yellow stripes on a Type-3 object marker slope?
What angle do the black and yellow stripes on a Type-3 object marker slope?
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Type-4 object markers are used primarily in construction zones.
Type-4 object markers are used primarily in construction zones.
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What shape are most regulatory signs typically?
What shape are most regulatory signs typically?
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What is the primary purpose of warning signs on the road?
What is the primary purpose of warning signs on the road?
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A blue background on a sign indicates directional information.
A blue background on a sign indicates directional information.
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What are the three main colors of traffic lights?
What are the three main colors of traffic lights?
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The maximum length of time for one complete rotation of a signal is known as the signal cycle's ______.
The maximum length of time for one complete rotation of a signal is known as the signal cycle's ______.
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Match the type of sign with its corresponding color:
Match the type of sign with its corresponding color:
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What does overuse of guide signs generally lead to?
What does overuse of guide signs generally lead to?
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Traffic phases in a cycle consist only of the green signal duration.
Traffic phases in a cycle consist only of the green signal duration.
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What is the primary objective of signal timing at intersections?
What is the primary objective of signal timing at intersections?
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What is the primary purpose of the change interval (yellow time) in a signal cycle?
What is the primary purpose of the change interval (yellow time) in a signal cycle?
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The clearance interval (all red) allows vehicles to enter the intersection safely after the green light turns red.
The clearance interval (all red) allows vehicles to enter the intersection safely after the green light turns red.
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What is the symbol given to the green interval for movement(s) i?
What is the symbol given to the green interval for movement(s) i?
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The ________ interval is timed to allow vehicles that enter on yellow to safely cross before conflicting flows are released.
The ________ interval is timed to allow vehicles that enter on yellow to safely cross before conflicting flows are released.
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Match the intervals with their descriptions:
Match the intervals with their descriptions:
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What does the symbol 'ari' represent in signal phasing?
What does the symbol 'ari' represent in signal phasing?
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The offset represents the time between the beginning of a green phase at one intersection and the beginning of the green phase at the next.
The offset represents the time between the beginning of a green phase at one intersection and the beginning of the green phase at the next.
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What does the red interval in a signal cycle signify?
What does the red interval in a signal cycle signify?
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Which color indicates that a driver must stop or should not enter?
Which color indicates that a driver must stop or should not enter?
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Traffic control devices include only signs and signals.
Traffic control devices include only signs and signals.
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What is the purpose of traffic control devices?
What is the purpose of traffic control devices?
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The color ___ is used for construction and maintenance warnings.
The color ___ is used for construction and maintenance warnings.
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Match the following colors with their meanings:
Match the following colors with their meanings:
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Which of the following is NOT a visual characteristic used in traffic control devices?
Which of the following is NOT a visual characteristic used in traffic control devices?
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Shape is the most easily visible characteristic of a traffic control device.
Shape is the most easily visible characteristic of a traffic control device.
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What type of traffic control device provides guidance for parking spaces for disabled drivers?
What type of traffic control device provides guidance for parking spaces for disabled drivers?
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What consists of a green interval, change interval, and clearance interval in traffic control?
What consists of a green interval, change interval, and clearance interval in traffic control?
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The Pacific Hour Factor (PHF) is calculated as Volume during peak hour divided by 4 times the volume during the peak 15 minutes.
The Pacific Hour Factor (PHF) is calculated as Volume during peak hour divided by 4 times the volume during the peak 15 minutes.
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What is the ideal saturation flow rate per lane during a green phase?
What is the ideal saturation flow rate per lane during a green phase?
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A __________ phase is designed exclusively for pedestrian traffic at intersections.
A __________ phase is designed exclusively for pedestrian traffic at intersections.
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Match the following types of traffic phases with their descriptions:
Match the following types of traffic phases with their descriptions:
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What is the purpose of the critical lane group?
What is the purpose of the critical lane group?
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The sum of critical lane volumes does not affect the required length of a particular traffic phase.
The sum of critical lane volumes does not affect the required length of a particular traffic phase.
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Define the Peak Hourly Factor (PHF).
Define the Peak Hourly Factor (PHF).
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Study Notes
Transport Engineering (CENG 3101) - Chapter 5: Traffic Management and Control
- Traffic is the movement of people, goods, vehicles, trains, ships, and airplanes from one location to another.
- Traffic management aims to make traffic movements fast, safe, and efficient.
- Traffic control devices include markings, signs, and signals.
- These devices are typically placed on highways, roads, traffic facilities, and public areas needing traffic control.
- Traffic control devices communicate with drivers through color, shape, and pattern.
- Colors used in traffic control are red, yellow, green, orange, black, blue, and brown.
- Shapes in traffic control include octagon (stop signs), horizontal rectangles (guide signs), triangles(yield signs), pennants (no passing signs), diamonds (warnings about hazards), vertical rectangles (regulatory signs), pentagons (school signs), and circles (railroad warning signs).
- Patterns in traffic control include double solid, solid, dashed, and broken lines.
- Traffic signs fall into regulatory, warning, and guide categories.
- Regulatory signs convey information on traffic laws, right-of-way, speed limits, parking, and other functions. They are typically rectangular with white backgrounds and black lettering/symbols.
- Warning signs alert drivers to unexpected or potentially hazardous conditions, typically diamond-shaped in yellow with black lettering or symbols.
- Guide signs provide information on destinations, services, or facilities, typically in green or blue backgrounds.
- Traffic signals use red, yellow, and green sequences for traffic control.
- Traffic signal operations include pretimed (fixed-time), actuated, semi-actuated, and adaptive systems.
- Signal timing objectives include reducing vehicle delays and accident probabilities while efficiently moving people.
- Signal cycles consist of green phases, change intervals, and clearance intervals.
- Components of signal cycles include:
- Cycle length: time for one complete signal rotation.
- Interval: a period during which no signal indication changes.
- Phases: the elements of the cycle: green, yellow, and red
- Offset: time lapse between the beginning of a green phase at an intersection and the beginning of a corresponding green phase at the next intersection
- There are 4 types of object markers
- Type 1 - retro reflectors (multiple) on a yellow/black diamond panel
- Type 2 - retro reflectors arranged horizontally/vertically on a white panel, at least 6”x12”.
- Type 3 - alternating black and yellow stripes, angled towards the side of traffic
- Type 4 – indicates the end of the roadway.
- The HCM method is used to calculate saturation flow rate and capacity.
- Webster's and HCM method can be used to determine the optimum cycle length.
- Some elements of signal design and timing include: phase plan, cycle length, lost time, critical lane volume, pedestrian needs, yellow time, and all-red time
- Specific examples and calculations are provided for understanding the processes involved in these stages.
Specific Topics (from the document)
-
Traffic Markings:
- Longitudinal markings (centerlines, lane lines, pavement edge lines)
- Transverse markings (crosswalks, parking spaces)
- Object markers (to identify obstructions)
-
Centerlines:
- Separate opposing traffic
- Single/double broken/solid lines indicate passing regulations
- Double solid lines denote no passing permitted.
-
Lane Markings:
- Separate traffic lanes in the same direction.
- Used on freeways, interstates, and multi-lane highways.
-
Edge Markings:
- Indicate edges of rural roads without curbs
- At least 150 mm from the edge
- Preferably light reflective using minute glass beads.
-
Warning lines:
- Alert drivers to obstacles on horizontal/vertical curves or no-overtaking zones.
- Consist of broken lines with specific dimensions.
-
Transverse markings:
- All transverse markings are white.
- Types include Broken Yellow Line, Double Solid Yellow Line, Solid Yellow Line, Broken White Line, Double Solid White Line, Solid White Line, and Dotted White Line.
-
Crosswalk markings:
- Marked at intersections with high conflict between vehicles and pedestrians.
- Use zebra markings to identify crosswalks.
-
Parking space markings:
- Not purely transverse, containing longitudinal and transverse elements
- Used to mark parking zones and spaces.
-
Directional arrows:
- Used to guide drivers to the right lane for busy intersections.
-
Word and Symbol Markings:
- Use words like "ONLY", "STOP", and "SCHOOL" in conjunction with other markings.
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Description
Test your knowledge on traffic markings, object markers, and road signs in this informative quiz. Understand the purpose and design of various traffic sign categories and the rules associated with them. Perfect for those studying road safety and traffic management.
