Name: Score:
53 Multiple choice questions
Definition 1 of 53
If significant threat of vehicle incursions into temporary pedestrian pathways _________ should be
installed.
traffic lights to control vehicle movement.
decorative fences to enhance the area.
permanent road signs indicating pedestrian pathways.
temporary traffic barriers
Definition 2 of 53
less expensive for long-term projects, easy to maintain, reusable, low deflection. Heavy
equipment needed for installation.
barrier deflection
portable concrete barriers
temporary traffic barriers
moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Definition 3 of 53
Clear Zone is measured from,
and is how far
The edge of the TRAVELED lane
Typically 30' for High-speed facilities
concrete, water-filled, anchored, move-able, mobile, steel
provide a 60"x60" passing area for wheelchairs every 200'
The exposed end is outside the clear zone
,Definition 4 of 53
Impact Barrels should overlap the fixed object on the traffic side by:
Minimum of 30"
780'
Minimum of 20"
Minimum of 29"
Definition 5 of 53
stationary non-redirective Impact Attenuators do what?
Re-direct vehicles that impact them
Moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Barrier deflection
Decelerate the vehicle to a stop
Definition 6 of 53
Typical Flare Rates for Barrier Rail - 70 MPH
18:1
15:1
20:1
10:1
,Definition 7 of 53
Activity Area Sub-components (3)
Concrete, Water-filled, Anchored, Move-able, Mobile, Steel
Portable Concrete Barriers
Buffer Space
Work Space
Traffic Space
Temporary Traffic Barriers
Definition 8 of 53
Arrow board visibility distance by design:
night time dimming:
location:
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn
Moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Light in color and supplemented with standard delineation or pavement markings
1 Mile
50%
shoulder at beginning of taper if possible, if not, as close to beginning as possible inside
taper.
Definition 9 of 53
Proper width for pedestrian pathway:
60"
40"
30"
36"
, Definition 10 of 53
Distance of L for 55 MPH with 12' Lane width
500'
660'
1320'
100'
Definition 11 of 53
limit distractions and discourage rubbernecking
reduce headlight glare from oncoming traffic
reduce floodlight glare from night work
should not be mounted where they reduce motirist visibility and sight distance
strategies for enhancing roadside advertising visibility
benefits of using reflective paint on road signs
methods for increasing the brightness of streetlights
uses of screens (mounted on top of rail)
53 Multiple choice questions
Definition 1 of 53
If significant threat of vehicle incursions into temporary pedestrian pathways _________ should be
installed.
traffic lights to control vehicle movement.
decorative fences to enhance the area.
permanent road signs indicating pedestrian pathways.
temporary traffic barriers
Definition 2 of 53
less expensive for long-term projects, easy to maintain, reusable, low deflection. Heavy
equipment needed for installation.
barrier deflection
portable concrete barriers
temporary traffic barriers
moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Definition 3 of 53
Clear Zone is measured from,
and is how far
The edge of the TRAVELED lane
Typically 30' for High-speed facilities
concrete, water-filled, anchored, move-able, mobile, steel
provide a 60"x60" passing area for wheelchairs every 200'
The exposed end is outside the clear zone
,Definition 4 of 53
Impact Barrels should overlap the fixed object on the traffic side by:
Minimum of 30"
780'
Minimum of 20"
Minimum of 29"
Definition 5 of 53
stationary non-redirective Impact Attenuators do what?
Re-direct vehicles that impact them
Moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Barrier deflection
Decelerate the vehicle to a stop
Definition 6 of 53
Typical Flare Rates for Barrier Rail - 70 MPH
18:1
15:1
20:1
10:1
,Definition 7 of 53
Activity Area Sub-components (3)
Concrete, Water-filled, Anchored, Move-able, Mobile, Steel
Portable Concrete Barriers
Buffer Space
Work Space
Traffic Space
Temporary Traffic Barriers
Definition 8 of 53
Arrow board visibility distance by design:
night time dimming:
location:
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn
Moved outside the clear zone or be shielded by barrier or crash cushion
placed on the shoulder or further from the traveled lane
delineated with retroreflective material in a continuous line
Light in color and supplemented with standard delineation or pavement markings
1 Mile
50%
shoulder at beginning of taper if possible, if not, as close to beginning as possible inside
taper.
Definition 9 of 53
Proper width for pedestrian pathway:
60"
40"
30"
36"
, Definition 10 of 53
Distance of L for 55 MPH with 12' Lane width
500'
660'
1320'
100'
Definition 11 of 53
limit distractions and discourage rubbernecking
reduce headlight glare from oncoming traffic
reduce floodlight glare from night work
should not be mounted where they reduce motirist visibility and sight distance
strategies for enhancing roadside advertising visibility
benefits of using reflective paint on road signs
methods for increasing the brightness of streetlights
uses of screens (mounted on top of rail)
