He emphasised that transport workers including maintenance workers and customer service officers are the "heart of [the] team" that keeps the system moving.
"Not long ago, I read a letter published in the Lianhe Zaobao, titled 'Please return my father to me'," said Siow.
The author, whose father had been a bus captain for twenty years, wrote about his long work hours and hard shifts, and how he appeared to choose work over family.
"At the end of her letter, she wrote, 'Family is the last bus in life that we must never miss.'," he related, adding that the letter reminded him of his relationship with his father who also worked long hours in a coffee shop.
"Growing up, I wished for his presence, even though I understood his absence.