Temporary Traffic Control California Version Questions
With Complete Solutions
Drums
-Shall be constructed of lightweight, deformable materials
-no metal drums
-minimum 36 inches height
-18 inches of width regardless of orientation
-shall have orange and white bands that are:
..horizontal
..circumferential
..alternating
..retroflective
-closed tops
-Ballast: should not be weighted with sand, water, or any
material
-Ballast shall not be placed on top of drums. In lower portion of
the drum, use:
..recycled rubber
..snap-on
..two-part system
..no sand or water
..nothing on top
Barricades
-Portable or fixed devices having from one to three rails with
appropriate markings
-Control road users by:
,..closing
..restricting
..delineating all or a portion of the right of way
-Types of barricades (number of retroreflective rails= barricade
type):
..Type 1 Barricades: one retroreflective rail. May be used on
conventional roads or urban streets
..Type 2 Barricades: two retroreflective rails. Should be used on
freeways and expressways or other high speed roadways
..Type 3 Barricades: three retroreflective rails. Should be used to
close or partially close a road. May be placed completely across
a roadway from curb to curb.
-Diagonal stripes o barricades should slop downward in the
direction toward which road users must turn or pass
-Barricade Ballast: sandbags may be placed on the lower parts of
the frame; keep low and to a minimum
Direction Indicator Barricades
-Built-in directional board and potentially a warning light
-May have built-in ballast
-Configurable boards
Longitudinal Channelizing Devices (LCDs)
-Are hollow and filled with water
-Are typically used to provide continuous detectable edging
-Do NOT contain or redirect a vehicle
Do NOT prevent vehicle intrusions
Are NOT a positive protection device!
,* Channelizing devises should not be intermixed for the same
use.
Maximum Device Spacing
-Should not exceed the maximum distances shown in table 6F-
101(CA)
-"conflict" Maximum Device Spacing used on intermediate and
short-term projects for taper and tangent sections where:
1. there are no pavement markings or
2. there is a conflict between existing pavement marking and
channelizes
Warning Lights
-Portable, lens-directed, enclosed lights
-the color or the light emitted shall be yellow
-may be used in either a steady-burn or flashing mode. Warning
lights shall have a minimum mounting height of 30 inches to the
bottom or the lens.
-Flashing lights (Type A and B) to draw attention to a sign or
hazard
-Steady-burn lights (type C and D) for delineation
-Warning light spacing should be identical to the channelizing
device spacing requirements
Types of Warning Lights
1.Type A= Low-intensity flashing
2. Type B= High-Intensity flashing
3. Type C= Steady-Burn
4. Type D= 360- degree steady-burn
, 1. Type A Warning Lights
-Low intensity flashing
-visible from 3,000 feet on a clear night
-To warn users during nighttime hours of:
.. hazards
..obstructions adjacent to the roadway
2. Type B Warning Lights
-High intensity flashing
-visible from 1,000 feet without sun behind
-To warn users during both daylight and nighttime
..may be mounted on advanced warning signs
3. Type C and D Warning Lights
-Constant= Low intensity steady burn
-Visible from 3,000 feet on a clear night
-May be used during nighttime hours to delineate the edge of the
traveled way
-Not for warning
Object Markers
-The Type N-3(CA) or OM 1-3: orange or fluorescent orange
retroreflective background
-Type P(CA), R(CA), OM-3L and OM-3: Alternating
retroreflective orange and white stripes
Temporary Pavement Markings
-Placed within TTC zones to provide road users with a clearly
defined path of travel through the TTC zone when the
With Complete Solutions
Drums
-Shall be constructed of lightweight, deformable materials
-no metal drums
-minimum 36 inches height
-18 inches of width regardless of orientation
-shall have orange and white bands that are:
..horizontal
..circumferential
..alternating
..retroflective
-closed tops
-Ballast: should not be weighted with sand, water, or any
material
-Ballast shall not be placed on top of drums. In lower portion of
the drum, use:
..recycled rubber
..snap-on
..two-part system
..no sand or water
..nothing on top
Barricades
-Portable or fixed devices having from one to three rails with
appropriate markings
-Control road users by:
,..closing
..restricting
..delineating all or a portion of the right of way
-Types of barricades (number of retroreflective rails= barricade
type):
..Type 1 Barricades: one retroreflective rail. May be used on
conventional roads or urban streets
..Type 2 Barricades: two retroreflective rails. Should be used on
freeways and expressways or other high speed roadways
..Type 3 Barricades: three retroreflective rails. Should be used to
close or partially close a road. May be placed completely across
a roadway from curb to curb.
-Diagonal stripes o barricades should slop downward in the
direction toward which road users must turn or pass
-Barricade Ballast: sandbags may be placed on the lower parts of
the frame; keep low and to a minimum
Direction Indicator Barricades
-Built-in directional board and potentially a warning light
-May have built-in ballast
-Configurable boards
Longitudinal Channelizing Devices (LCDs)
-Are hollow and filled with water
-Are typically used to provide continuous detectable edging
-Do NOT contain or redirect a vehicle
Do NOT prevent vehicle intrusions
Are NOT a positive protection device!
,* Channelizing devises should not be intermixed for the same
use.
Maximum Device Spacing
-Should not exceed the maximum distances shown in table 6F-
101(CA)
-"conflict" Maximum Device Spacing used on intermediate and
short-term projects for taper and tangent sections where:
1. there are no pavement markings or
2. there is a conflict between existing pavement marking and
channelizes
Warning Lights
-Portable, lens-directed, enclosed lights
-the color or the light emitted shall be yellow
-may be used in either a steady-burn or flashing mode. Warning
lights shall have a minimum mounting height of 30 inches to the
bottom or the lens.
-Flashing lights (Type A and B) to draw attention to a sign or
hazard
-Steady-burn lights (type C and D) for delineation
-Warning light spacing should be identical to the channelizing
device spacing requirements
Types of Warning Lights
1.Type A= Low-intensity flashing
2. Type B= High-Intensity flashing
3. Type C= Steady-Burn
4. Type D= 360- degree steady-burn
, 1. Type A Warning Lights
-Low intensity flashing
-visible from 3,000 feet on a clear night
-To warn users during nighttime hours of:
.. hazards
..obstructions adjacent to the roadway
2. Type B Warning Lights
-High intensity flashing
-visible from 1,000 feet without sun behind
-To warn users during both daylight and nighttime
..may be mounted on advanced warning signs
3. Type C and D Warning Lights
-Constant= Low intensity steady burn
-Visible from 3,000 feet on a clear night
-May be used during nighttime hours to delineate the edge of the
traveled way
-Not for warning
Object Markers
-The Type N-3(CA) or OM 1-3: orange or fluorescent orange
retroreflective background
-Type P(CA), R(CA), OM-3L and OM-3: Alternating
retroreflective orange and white stripes
Temporary Pavement Markings
-Placed within TTC zones to provide road users with a clearly
defined path of travel through the TTC zone when the
