The order followed rare criticism of royal motorcades and other inconveniences that Thais have aired online in recent months.
Thai police will instead block off only a part of the roads for the motorcade, said spokesperson Narumon Pinyosinwat on her Facebook page.
She also posted a video outlining the new rules, which also included allowing people to resume using bridges that tower over the motorcade route.
“His Majesty the King is concerned his royal travel or that of the royal family’s could affect Thai people’s commute,” said a voice-over in the video.
Bangkok is one of the most congested major cities in the world, ranking 11th on US-based traffic analytics firm INRIX’s Global Traffic Scorecard in 2017.
Last year, the #royalmotorcade hashtag became one of the top-trending subjects on Thai-language Twitter.
Another recent hashtag, #islandsclosure, also rose to the top of the Twitter trending list over the New Year holidays, as southern tourist islands were closed off for visits by the king’s youngest daughter.
Thailand has a tough law against insulting the king, queen, heir or regent.
Anyone who violates this law faces up to 15 years in prison. — Reuters