The move is among measures meant to ensure that "one particular behavioural system of any other group cannot be imposed on other commuters on board", the agency's spokesperson Lilian Mofokeng is quoted as saying.

It will also enhance passenger safety and onboard cleanliness.

"We are doing this in an effort to ensure that there is the free passage of movement for our commuters, so that they are kept clean and safe," she said.

Informal traders and preachers have opposed the new measure.