MUTCD Chapter 6 Flashcards

Questions and Answers

A reduction in speed of this amount requires signage in a TTC zone.

10 mph

What are the four areas of a TTC zone?

Advance warning area, transition area, activity area, and termination area

What are the three types of spaces within the activity area?

Buffer space, traffic space, and work space

What type of vehicle can guide drivers through a TTC zone?

Pilot car Signup and view all the answers

What vehicle provides improved visibility for workers in the TTC zone?

Shadow vehicle Signup and view all the answers

Stop/slow paddles are this shape.

Octagon Signup and view all the answers

Flags are this color at night.

Retroreflectorized red Signup and view all the answers

Flashing lights should flash at this rate interval.

50-60 per minute Signup and view all the answers

AFAD's should only be used when there are this many lanes on an approach.

One lane Signup and view all the answers

The length of retroreflectivity tape on gate arms.

16 inches Signup and view all the answers

Grade Crossing Advance Warning Sign in a TTC zone has this color scheme.

Black legend and border on a yellow background Signup and view all the answers

Minimum height of signs above sidewalks.

7 ft; 5 ft for rural areas (but they don't have sidewalks) Signup and view all the answers

The shape of TTC warning signs.

Diamond Signup and view all the answers

All arrow boards should be able to dim to this percent of full brightness.

50% Signup and view all the answers

Flashing rate of arrow boards.

25-40 flashes per minute Signup and view all the answers

Drums have these minimum dimensions.

18 inch diameter and 36 inch height Signup and view all the answers

These are the two types of crash cushions.

Stationary crash cushions and truck-mounted attenuators Signup and view all the answers

Long-term stationary work lasts for this amount of time.

Three days Signup and view all the answers

Short-term stationary works is at least this amount of time.

One hour Signup and view all the answers

Length of time for a minor traffic incident.

30 minutes Signup and view all the answers

Length of time for a major traffic incident.

2 hours Signup and view all the answers

These describe TTC measures to be used for facilitating road users through a work zone or an incident area.

TTC plan Signup and view all the answers

This is an area of a highway where road users' conditions are changed because of a work zone, an incident zone, or a planned special event.

TTC zone Signup and view all the answers

This is an area of a highway with construction, maintenance, or utility work activities.

Work zone Signup and view all the answers

This is an area of a highway where temporary traffic controls are imposed by authorized officials in response to a traffic incident.

Incident zone Signup and view all the answers

This is the section of highway where road users are informed about the upcoming work zone or incident area.

Advance warning area Signup and view all the answers

This is the section of highway where road users are redirected out of their normal path.

Transition area Signup and view all the answers

This is the section of the highway where the work activity takes place.

Activity area Signup and view all the answers

This is that portion of the highway closed to road users and set aside for workers, equipment, and material, and a shadow vehicle if one is used upstream.

Work space Signup and view all the answers

This is the portion of the highway in which road users are routed through the activity area.

Traffic space Signup and view all the answers

This is a lateral and/or longitudinal area that separates road user flow from the work space or an unsafe area, and might provide some recovery space for an errant vehicle.

Buffer space Signup and view all the answers

This is the section of the highway where road users are returned to their normal driving path.

Termination area Signup and view all the answers

This kind of taper requires the longest distance.

Merging taper Signup and view all the answers

This is a temporary rerouting of road users onto an existing highway in order to avoid a TTC zone.

Detour Signup and view all the answers

Study Notes

Traffic Control (TTC) Zones

A reduction in speed of 10 mph necessitates signage in a TTC zone.
Four areas define a TTC zone: advance warning area, transition area, activity area, and termination area.

Activity Area Spaces

Three types of spaces are present: buffer space, traffic space, and work space.

Vehicle Guidance in TTC Zones

A pilot car is essential for guiding drivers through a TTC zone.
A shadow vehicle enhances visibility for workers within the TTC zone.

Signage and Visibility

Stop/slow paddles are octagonal in shape.
Flags at night must be retroreflectorized red for visibility.
Flashing lights in work zones should flash at a rate of 50-60 times per minute.

Traffic Control Devices

Automatic Flagger Assistance Devices (AFADs) are only appropriate for single-lane approaches.
Retroreflectivity tape on gate arms measures 16 inches in length.
Grade Crossing Advance Warning Signs use a color scheme of black legend and border on a yellow background.

Sign Heights and Shapes

Minimum sign height above sidewalks is 7 feet; it's 5 feet in rural areas without sidewalks.
TTC warning signs have a diamond shape.

Arrow Boards and Drums

All arrow boards should be able to dim to 50% of full brightness.
The flashing rate for arrow boards is 25-40 flashes per minute.
Drums used for traffic control must have a minimum diameter of 18 inches and height of 36 inches.

Crash Cushions

Two types of crash cushions exist: stationary crash cushions and truck-mounted attenuators.

Work Duration

Long-term stationary work lasts at least 3 days.
Short-term stationary work must last a minimum of 1 hour.
Minor traffic incidents are defined as those lasting up to 30 minutes.
Major traffic incidents last around 2 hours.

TTC Plans and Zones

TTC plans outline the measures for facilitating user movement through work zones or incident areas.
A TTC zone represents an area where conditions change due to work, incidents, or events.
Work zones are specific areas with construction, maintenance, or utility activities.
Incident zones are areas with temporary traffic controls due to accidents.

Transitioning Through TTC Zones

The advance warning area informs road users of upcoming work or incidents.
A transition area redirects road users away from their usual path.
Activity areas are where actual work takes place.
Work spaces are reserved for personnel, equipment, and material, including shadow vehicles.
Traffic spaces route users through the active work area.
Buffer spaces provide separation between road users and work areas, offering recovery space if needed.
Termination areas return road users to their normal driving paths.

Tapers and Detours

Merging tapers require the longest distance for safe transitions.
Detours re-route users onto existing highways to avoid TTC zones.

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Description

Test your knowledge on the key concepts of the MUTCD Chapter 6. This quiz covers important terms and definitions related to temporary traffic control zones, including speed reductions and the various areas of a TTC zone. Perfect for traffic management students and professionals.