Yellow flags, portraits, the national anthem — the practical guide to the royal family's presence in everyday Bangkok.
Yellow represents King Bhumibol (Monday birthday colour); blue represents King Vajiralongkorn (Friday birthday colour) — these decorate streets on royal occasions.
Played at 8 AM and 6 PM at public venues (train stations, parks, public spaces) — Thais stop and stand; visitors should too; it lasts about 60 seconds.
Full-colour portraits of the King and Queen appear in every school, government office, and many shops — not propaganda per se, genuine cultural expression of respect.
If you see police stopping traffic on a major road for a motorcade, it's likely royal — step to the side of the road and wait; do not photograph directly.
The late King Bhumibol's development projects (Royal Project Foundation) appear on products throughout Thailand — buying these supports rural development initiatives.
Every piece of Thai currency carries the King's image — never step on a coin or banknote to stop it blowing away, a common local reflex that visitors should be aware of.