With about 5.5 million people riding the subway system daily, police say they must pay extra attention to zero in on crime, especially in some of the busiest stations like Atlantic Avenue.

Waking up commuters is a big part of the job for Officer Sarah Seda and her partner. She says people often fall asleep on the subway, allowing them to be robbed of their cellphone or other belongings.

The officers say theft accounts for about half of all crime at subway stations citywide.

They also check in with conductors to make sure trains are running well and help people with directions.

Police say the station at Barclays Center/Atlantic Avenue is among the city's busiest and is a hot spot for crime.

Vincent Coogan, Transit Bureau executive officer, says they study surveillance video and that every officer gets alerts on what they should be mindful of.

Officers also rely on K-9 units and commuters. Help points are one way city officials are using technology to stay on top of crime. Hitting the red button is for emergencies, the green one provides information.

Police say it takes a community to fight crime. That includes attentive commuters and officers who want to get straphangers to their destinations safely.