Speaking to CP24 on Tuesday afternoon, TTC spokesman Stuart Green said the transport service would add security personnel as a reassurance.
“We are going to give people the reassurance that TTC is safe,” Green said.
At least 10 people were shot Monday morning when a gunman in a construction vest fired a canister and opened fire on a Brooklyn subway train.  The motive for the attack is not yet clear.
Green said the TTC was sending best wishes to the victims of the attack, adding that it was a “difficult day” for anyone traveling.
“If you’re using public transportation today, whether it’s TTC or another system, you’re thinking about what happened in New York,” Green said.  “So, as a way of showing people that we’re out there – we’re always out there – but one day like today, just to remind them that we’re out there, we’re going to have some extra police officers out there.”
Green added that TTC has an “excellent” working relationship with Toronto police and has added more cameras to its properties, as well as increasing the number of staff on the stations.
He also reminded riders that if they noticed anything suspicious or unusual, they should report it immediately to a uniformed TTC staff member.
Metrolinx spokeswoman Anne Marie Aikins said the provincial transport service would also add more police officers to its systems in light of the shootings.
Speaking about the situation earlier in the day, Toronto Police Chief James Ramer said more officers had been deployed to the crossing system as a precaution.
“I want to reassure the public that we are constantly monitoring security issues, not just in Toronto, but around the world,” Ramer said.  “In response, we are making appropriate adjustments to our plans in order to mitigate potential risks to public safety.  “Given these recent events, we have developed a larger number of uniformed police officers on public transport.”
Ramer added that at the moment “there is no recognized threat to the city of Toronto”, but urged the public to remain vigilant.
“If you see something, say something,” Ramer said.  “Everyone can do their duty by contacting the police if they see or encounter anything suspicious.”