LATEST 2026 ATSSA TCS MODULES 3 PARTS OF
TTC ZONE & 4 TTC DEVICES Q&A 100% PASS
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Practice questions for this set
Learn 1 /7 Study with Learn
No more than 2 phases. No more than 3 lines of text per phase. Yes
Abbreviations. No animation
Choose an answer
1 Roundabouts 2 Screens
3 Messages on PCMS 4 Signs clearances
Don't know?
Terms in this set (26)
Roundabouts Not in MUTCS. Consider detours. If single lane,
treat as flagger operation. Getting popular
, Speed Posted speed=speed limit (min) Off-peak 85th
percentile speed prior to work starting or the
anticipated operating speed. Not necessarily the
posted speed
85th percentile speed The speed at or below which 85 percent of the
motor vehicles travel operating speed in free
flow conditions. Often 7-8 mph above posted
speed
Multiple tapers If more than one taper is needed, they should be
separated by a tangent (transition) distance. This
distance allows drivers to adjust to one condition
before moving to another one. Two cases: 1)
Merging taper followed by a second merging
taper -2L
2) Merging taper followed by a shifting taper -
1/2L
Signs clearances Clearances: 1) Rural=5ft min. with advisory speed
plaque=4 ft. min.2) Business, commercial and
residential= 7 ft.
Signs colors and sizes 13 colors most common - For conventional road=
the majority of the signs measure 30 x 30, 36 x36,
24 x 18, 24 x 12 and Road closed 48 x30
TTC ZONE & 4 TTC DEVICES Q&A 100% PASS
Save
Practice questions for this set
Learn 1 /7 Study with Learn
No more than 2 phases. No more than 3 lines of text per phase. Yes
Abbreviations. No animation
Choose an answer
1 Roundabouts 2 Screens
3 Messages on PCMS 4 Signs clearances
Don't know?
Terms in this set (26)
Roundabouts Not in MUTCS. Consider detours. If single lane,
treat as flagger operation. Getting popular
, Speed Posted speed=speed limit (min) Off-peak 85th
percentile speed prior to work starting or the
anticipated operating speed. Not necessarily the
posted speed
85th percentile speed The speed at or below which 85 percent of the
motor vehicles travel operating speed in free
flow conditions. Often 7-8 mph above posted
speed
Multiple tapers If more than one taper is needed, they should be
separated by a tangent (transition) distance. This
distance allows drivers to adjust to one condition
before moving to another one. Two cases: 1)
Merging taper followed by a second merging
taper -2L
2) Merging taper followed by a shifting taper -
1/2L
Signs clearances Clearances: 1) Rural=5ft min. with advisory speed
plaque=4 ft. min.2) Business, commercial and
residential= 7 ft.
Signs colors and sizes 13 colors most common - For conventional road=
the majority of the signs measure 30 x 30, 36 x36,
24 x 18, 24 x 12 and Road closed 48 x30
