NEW YORK, July 8 (Xinhuanet) -- Undeterred by the terror attacks in London, New York commuters boarded trains, subways and buses as they got on with business as usual Friday.

    Security remains tight throughout the city, with law enforcement officials ramping up the police presence around town.

    City officials said resources have been re-directed to secure mass transit, roadways, waterways and air space.

    Police Commissioner Ray Kelly said earlier that while police cannot be in every train car, they are doing everything they can to prevent a similar attack in the city, noting they do it on an unannounced, irregular basis.

    He said all these are aimed at keeping somebody who is doing reconnaissance, or planning to do something "untoward, off balance."

    Many commuters said they have no choice but to get on with their lives, while police are continuing to remind people if they see something suspicious to call 911.

    Drivers are seeing tighter security as well at all bridges and tunnels. Trucks were banned on the Williamsburg Bridge, and officials have also set up security checkpoints in lower Manhattan.     

    The New York Police Department (NYPD) harbor units and coast guard boats are escorting Staten Island ferry boats with more patrols posted at both of its terminals. Also, heavily-armed Hercules teams have been deployed and helicopters are patrolling the skies.

    Mayor Michael Bloomberg visited the British consulate in Manhattan Friday to sign the condolence book for the victims of yesterday's attacks. The mayor offered the people of London any assistance they may need.

    Bloomberg also confirmed the New York and London police departments will work together to capture the bombers and prevent any more attacks.

    "There is no threat that we know of today, other than the constant threat of us being in a dangerous world, and we are going to keep our guard up," said the mayor. "The best thing we can do is to prevent, and so far we have been fortunate."

    Even with the increased security presence, or perhaps because of it, transit officials said that ridership on the city's subways and buses remained at normal levels Friday. Enditem