ATSSA TCS MODULES 3 PARTS OF TTC
ZONE & 4 TTC DEVICES. EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
Roundabouts - ANS Not in MUTCS. Consider detours. If single lane, treat as flagger operation.
Getting popular
Speed - ANS 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 - ANS 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 - ANS 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 - ANS Clearances: 1) Rural=5ft min. with advisory speed plaque=4 ft. min.2)
Business, commercial and residential= 7 ft.
Signs colors and sizes - ANS 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
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 4
ZONE & 4 TTC DEVICES. EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
Roundabouts - ANS Not in MUTCS. Consider detours. If single lane, treat as flagger operation.
Getting popular
Speed - ANS 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 - ANS 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 - ANS 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 - ANS Clearances: 1) Rural=5ft min. with advisory speed plaque=4 ft. min.2)
Business, commercial and residential= 7 ft.
Signs colors and sizes - ANS 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
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 4
