Mr Chadchart’s rare comment on the People's Democratic Reform Committee (PDRC) came after the group last week told its supporters to prepare for a major rally after the New Year holiday to shut down the capital for 10-20 days.
In a message posted on his Facebook page, Mr Chardchart said traffic in Bangkok was supervised by three agencies: the Transport Ministry, City Hall and traffic police.
It was estimated that 13 million people now lived in inner and outer Bangkok, while there were 3.5 million workers and 1.8 million pupils and students.
“These people altogether make a total of 17 million trips in the city each day to and from their workplaces or schools or to run their errands," said Mr Chadchart.
“The PDRC’s city shutdown plan may not affect jobless people, high-level executives, business owners who were not required to punch in at work or those who had condominiums along the BTS and MRT lines.
“But for most people such as company employees, taxi-drivers and students, who had to get up early and travel in the morning rush hour traffic every day would directly suffer from the PDRC’s planned siege.”
Mr Chadchart said section 34 of the Constitution clearly stipulated that “a person shall enjoy the liberty of travelling within the Kingdom. A restriction shall not be imposed except by virtue of the law specifically enacted for the security of the State, public order and public welfare.”
“I, as a person who accounts for transportation affairs, disagree with taking the travelling public hostage or precipitating a cause that leads to disorder.
“To reform the country, if it starts with violating other people’s rights, it may continue with difficulty,” Mr Chadchart said.
Mr Chadchart said he wanted to know Bangkok Governor Sukhumbhand Paribatra’s stance on the PDRC’s announcement to paralyse the capital, saying he and the traffic police would have to work with ML Sukhumbhand in facilitating and providing safety for Bangkok commuters.