RE-CERTIFICATION QUESTIONS WITH
100% SOLVED ANSWERS!!
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Definition
Light in color and supplemented with standard delineation or
pavement markings
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Dark in color and supplemented If Temporary Traffic Barriers
are used as channelizing
with reflective strips only
devices they should be:
, Bright in color and used without any Neutral in color and paired with
markings temporary signs only
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Definition
50'-100' regardless of speed
6 devices 10'-20' apart
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When it is not possible to maintain
proper pathway width provide how far should a PCMS be
what? visible? Portable changeable
message sign
Recommended Advanced Warning One-Lane, Two-Way Taper
Sign Spaceing: freeways and (Flagger taper) Length and
expressways (3) number of devices
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Definition
780'
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, 700' 650'
Distance of L for 65 MPH
12' Lane width 850'
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4 of 53
Definition
Temporary Traffic Barriers
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Worker Safety Planning
Buffer Space Work Space Traffic Space
Portable devices designed to prevent penetration by vehicles while
minimizing injuries to vehicle occupants.
Main function: PROTECTION
Secondary function: CHANNELIZATION
if not needed for protection then it SHALL NOT BE USED
Portable Concrete Barriers
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, 5 of 53
Term
Barrier selection guidelines based on
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speed, traffic volume /
composition, road
classification, deflection Stationary non-redirective (inertial)
space, roadway Impact Attenuators
alignment, sight distance,
other factors.
A: Low intensity flashing The off peak 85th percentile. Which
B: High-intensity flashing is the speed at or below which
C: Steady Burn 85% of vehicles travel operating
D: 360° steady burn speed in free flow conditions
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6 of 53
Definition
500'
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400' 600'