Reference
Traffic sign library
Revisit warning, regulatory, and directional signs that commonly appear in theory prep.
Why the correct answer works:
What this question teaches
Learn traffic-system abbreviations accurately because they identify the equipment or instruction being discussed. TSD refers to a Traffic Sign Display.
Official source: Singapore Police Force Online Learning Portal: Basic Theory of Driving
Topic
Traffic Signs
Mandatory, prohibitory, warning, information, and directional signs and what each shape and colour means.
Road Knowledge
Theory test guide
Review test order, PDL timing, and study structure before your next practice run.
Penalties
Demerit points (DIPS)
Pair rule knowledge with the thresholds and offence types that matter to real drivers.