ATSSA TRAFFIC CONTROL SUPERVISOR 2025 QUESTIONS
WITH ANSWERS RATED A+
✔✔Light in color and supplemented with standard delineation or pavement markings -
✔✔If Temporary Traffic Barriers are used as channelizing devices they should be:
✔✔Appropriately flared or protected with properly installed crash cushions - ✔✔The
blunt end of a barrier is a hazard. *ALL* upstream leading ends shall be:
✔✔20:1 - ✔✔Typical Flare Rates for Barrier Rail - 70 MPH
✔✔18:1 - ✔✔Typical Flare Rates for Barrier Rail - 60 MPH
✔✔Decrease by 2:1 per 5 MPH
stopping at 30 MPH with 8:1 - ✔✔Below 60 MPH Barrier Flare Rates Decrease by
✔✔The exposed end is outside the clear zone - ✔✔Extend Barrier Rail Flare until
✔✔The edge of the *TRAVELED* lane
Typically 30' for High-speed facilities - ✔✔Clear Zone is measured from,
and is how far
✔✔channel
pin and loop (to be phased-out) - ✔✔types of barrier connections
✔✔Stationary non-redirective (inertial) Impact Attenuators - ✔✔Sand barrels are an
example of what?
✔✔Re-direct vehicles that impact them - ✔✔Re-directive Impact Attenuators do what?
✔✔Decelerate the vehicle to a stop - ✔✔stationary non-redirective Impact Attenuators
do what?
✔✔Minimum of 30" - ✔✔Impact Barrels should overlap the fixed object on the traffic
side by:
✔✔Stationing
0+00' - ✔✔A conventional way of identifying distances on the plan and on the ground.
Located every hundred feet.
✔✔Cones at least 28" with 2 white retroreflective bands
flaggers properly illuminater
controlled glare
, proper apparel (recommended class 3) - ✔✔Nighttime checklist
✔✔60" - ✔✔Proper width for pedestrian pathway:
✔✔provide a 60"x60" passing area for wheelchairs every 200' - ✔✔When it is not
possible to maintain proper pathway width provide what?
✔✔temporary traffic barriers - ✔✔If significant threat of vehicle incursions into
temporary pedestrian pathways _________ should be installed.
✔✔2 or 3 - ✔✔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 ___.
✔✔ L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - ✔✔Formula for Min. taper length
✔✔The off peak 85th percentile. Which is the speed at or below which 85% of vehicles
travel operating speed in free flow conditions - ✔✔speed used in formulas should be
✔✔125' - ✔✔Distance of L for 25 MPH with 12' Lane width
✔✔245' - ✔✔Distance of L for 35 MPH with 12' Lane width
✔✔540' - ✔✔Distance of L for 45 MPH with 12' Lane width
✔✔660' - ✔✔Distance of L for 55 MPH with 12' Lane width
✔✔780' - ✔✔Distance of L for 65 MPH 12' Lane width
✔✔L Minimum - ✔✔Merging Taper Length
✔✔1/2 L Minimum - ✔✔Shifting Taper Length
✔✔1/3 L Minimum - ✔✔Shoulder Taper Length
✔✔50'-100' regardless of speed
6 devices 10'-20' apart - ✔✔One-Lane, Two-Way Taper (Flagger taper) Length and
number of devices
WITH ANSWERS RATED A+
✔✔Light in color and supplemented with standard delineation or pavement markings -
✔✔If Temporary Traffic Barriers are used as channelizing devices they should be:
✔✔Appropriately flared or protected with properly installed crash cushions - ✔✔The
blunt end of a barrier is a hazard. *ALL* upstream leading ends shall be:
✔✔20:1 - ✔✔Typical Flare Rates for Barrier Rail - 70 MPH
✔✔18:1 - ✔✔Typical Flare Rates for Barrier Rail - 60 MPH
✔✔Decrease by 2:1 per 5 MPH
stopping at 30 MPH with 8:1 - ✔✔Below 60 MPH Barrier Flare Rates Decrease by
✔✔The exposed end is outside the clear zone - ✔✔Extend Barrier Rail Flare until
✔✔The edge of the *TRAVELED* lane
Typically 30' for High-speed facilities - ✔✔Clear Zone is measured from,
and is how far
✔✔channel
pin and loop (to be phased-out) - ✔✔types of barrier connections
✔✔Stationary non-redirective (inertial) Impact Attenuators - ✔✔Sand barrels are an
example of what?
✔✔Re-direct vehicles that impact them - ✔✔Re-directive Impact Attenuators do what?
✔✔Decelerate the vehicle to a stop - ✔✔stationary non-redirective Impact Attenuators
do what?
✔✔Minimum of 30" - ✔✔Impact Barrels should overlap the fixed object on the traffic
side by:
✔✔Stationing
0+00' - ✔✔A conventional way of identifying distances on the plan and on the ground.
Located every hundred feet.
✔✔Cones at least 28" with 2 white retroreflective bands
flaggers properly illuminater
controlled glare
, proper apparel (recommended class 3) - ✔✔Nighttime checklist
✔✔60" - ✔✔Proper width for pedestrian pathway:
✔✔provide a 60"x60" passing area for wheelchairs every 200' - ✔✔When it is not
possible to maintain proper pathway width provide what?
✔✔temporary traffic barriers - ✔✔If significant threat of vehicle incursions into
temporary pedestrian pathways _________ should be installed.
✔✔2 or 3 - ✔✔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 ___.
✔✔ L=(WS²)/60 for 40MPH or less,
L=WS for 45MPH or more - ✔✔Formula for Min. taper length
✔✔The off peak 85th percentile. Which is the speed at or below which 85% of vehicles
travel operating speed in free flow conditions - ✔✔speed used in formulas should be
✔✔125' - ✔✔Distance of L for 25 MPH with 12' Lane width
✔✔245' - ✔✔Distance of L for 35 MPH with 12' Lane width
✔✔540' - ✔✔Distance of L for 45 MPH with 12' Lane width
✔✔660' - ✔✔Distance of L for 55 MPH with 12' Lane width
✔✔780' - ✔✔Distance of L for 65 MPH 12' Lane width
✔✔L Minimum - ✔✔Merging Taper Length
✔✔1/2 L Minimum - ✔✔Shifting Taper Length
✔✔1/3 L Minimum - ✔✔Shoulder Taper Length
✔✔50'-100' regardless of speed
6 devices 10'-20' apart - ✔✔One-Lane, Two-Way Taper (Flagger taper) Length and
number of devices
