ATSSA Traffic Control Supervisor Re-
Certification Questions and Answers
MASH - ANSWER-NCHRP 350 rewritten by AASHTO and is now an AASHTO
document called what?
1 Mile
50%
shoulder at beginning of taper if possible, if not, as close to beginning as possible inside
taper. - ANSWER-Arrow board visibility distance by design:
night time dimming:
location:
1/2 L Minimum - ANSWER-Shifting Taper Length
1/2 mile visibility day and night - ANSWER-how far should a PCMS be visible?
Portable changeable message sign
1/2L - ANSWER-Tangent distance before shifting taper
1/3 L Minimum - ANSWER-Shoulder Taper Length
100' - ANSWER-Recommended Advanced Warning Sign Spaceing: Urban (low speed)
1000', 1500', and 2640' - ANSWER-Recommended Advanced Warning Sign Spaceing:
freeways and expressways (3)
125' - ANSWER-Distance of L for 25 MPH with 12' Lane width
125' 245' 540' 660' 780' - ANSWER-Distance of L with 12' Lane Width for:\
25, 35, 45, 55, 65 MPH
18:1 - ANSWER-Typical Flare Rates for Barrier Rail - 60 MPH
2 or 3 - ANSWER-All workers, including emergency responders, within the right-of-way
who are exposed either to
traffic (vehicles using the highway for purposes of travel) or to work vehicles and
construction equipment
within the TTC zone shall wear high-visibility safety apparel that meets the Performance
Class ___ or ___.
20:1 - ANSWER-Typical Flare Rates for Barrier Rail - 70 MPH
245' - ANSWER-Distance of L for 35 MPH with 12' Lane width
, 2L - ANSWER-Tangent distance (between tapers)
350' - ANSWER-Recommended Advanced Warning Sign Spaceing: urban (high speed)
50'-100' per lane - ANSWER-Downstream taper Length
50'-100' regardless of speed
6 devices 10'-20' apart - ANSWER-One-Lane, Two-Way Taper (Flagger taper) Length
and number of devices
500' - ANSWER-Recommended Advanced Warning Sign Spaceing: Rural
540' - ANSWER-Distance of L for 45 MPH with 12' Lane width
60" - ANSWER-Proper width for pedestrian pathway:
660' - ANSWER-Distance of L for 55 MPH with 12' Lane width
780' - ANSWER-Distance of L for 65 MPH 12' Lane width
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn - ANSWER-Warning lights types:
Type A:
Type B:
Type C:
Type D:
Appropriately flared or protected with properly installed crash cushions - ANSWER-The
blunt end of a barrier is a hazard. *ALL* upstream leading ends shall be:
Barrier deflection - ANSWER-the distance a barrier will displace when struck
Buffer Space
Work Space
Traffic Space - ANSWER-Activity Area Sub-components (3)
channel
pin and loop (to be phased-out) - ANSWER-types of barrier connections
concrete, water-filled, anchored, move-able, mobile, steel - ANSWER-types of
temporary traffic barriers
Cones at least 28" with 2 white retroreflective bands
Certification Questions and Answers
MASH - ANSWER-NCHRP 350 rewritten by AASHTO and is now an AASHTO
document called what?
1 Mile
50%
shoulder at beginning of taper if possible, if not, as close to beginning as possible inside
taper. - ANSWER-Arrow board visibility distance by design:
night time dimming:
location:
1/2 L Minimum - ANSWER-Shifting Taper Length
1/2 mile visibility day and night - ANSWER-how far should a PCMS be visible?
Portable changeable message sign
1/2L - ANSWER-Tangent distance before shifting taper
1/3 L Minimum - ANSWER-Shoulder Taper Length
100' - ANSWER-Recommended Advanced Warning Sign Spaceing: Urban (low speed)
1000', 1500', and 2640' - ANSWER-Recommended Advanced Warning Sign Spaceing:
freeways and expressways (3)
125' - ANSWER-Distance of L for 25 MPH with 12' Lane width
125' 245' 540' 660' 780' - ANSWER-Distance of L with 12' Lane Width for:\
25, 35, 45, 55, 65 MPH
18:1 - ANSWER-Typical Flare Rates for Barrier Rail - 60 MPH
2 or 3 - ANSWER-All workers, including emergency responders, within the right-of-way
who are exposed either to
traffic (vehicles using the highway for purposes of travel) or to work vehicles and
construction equipment
within the TTC zone shall wear high-visibility safety apparel that meets the Performance
Class ___ or ___.
20:1 - ANSWER-Typical Flare Rates for Barrier Rail - 70 MPH
245' - ANSWER-Distance of L for 35 MPH with 12' Lane width
, 2L - ANSWER-Tangent distance (between tapers)
350' - ANSWER-Recommended Advanced Warning Sign Spaceing: urban (high speed)
50'-100' per lane - ANSWER-Downstream taper Length
50'-100' regardless of speed
6 devices 10'-20' apart - ANSWER-One-Lane, Two-Way Taper (Flagger taper) Length
and number of devices
500' - ANSWER-Recommended Advanced Warning Sign Spaceing: Rural
540' - ANSWER-Distance of L for 45 MPH with 12' Lane width
60" - ANSWER-Proper width for pedestrian pathway:
660' - ANSWER-Distance of L for 55 MPH with 12' Lane width
780' - ANSWER-Distance of L for 65 MPH 12' Lane width
A: Low intensity flashing
B: High-intensity flashing
C: Steady Burn
D: 360° steady burn - ANSWER-Warning lights types:
Type A:
Type B:
Type C:
Type D:
Appropriately flared or protected with properly installed crash cushions - ANSWER-The
blunt end of a barrier is a hazard. *ALL* upstream leading ends shall be:
Barrier deflection - ANSWER-the distance a barrier will displace when struck
Buffer Space
Work Space
Traffic Space - ANSWER-Activity Area Sub-components (3)
channel
pin and loop (to be phased-out) - ANSWER-types of barrier connections
concrete, water-filled, anchored, move-able, mobile, steel - ANSWER-types of
temporary traffic barriers
Cones at least 28" with 2 white retroreflective bands
