Airline passengers pass through security May 2, 2011 at Orlando International Airport. (STAN HONDA/AFP/GETTY IMAGES)

From daily commutes to cross-country travel, Americans still have to get from one point to another. Though travel centers around the country are heightening security individually, the Department of Homeland Security has not issued new travel safety alerts.

“We remain at a heightened state of vigilance,” Secretary of Homeland Security Janet Napolitano said in a statement released Monday morning, adding that no alerts would be made to the National Terrorism Advisory System.

At Baltimore-Washington International Thurgood Marshall Airport, security is heightened but no delays are expected. Throughout the Washington area, travelers on Metro bus and rail systems should see increased security as a precautionary measure. D.C. Mayor Vincent C. Gray said Monday:

Like any metropolitan area with a large transit system, we remain vigilant in monitoring and ensuring public safety. Metro has done a great job in alerting passengers to be aware of their surroundings.

The story should be the same at airports and other travel centers around the country. A roundup of airports with announced heightened security:

• Miami, Fort Lauderdale-Hollywood and Palm Beach international airports will increase security patrols.

• Boston’s Logan Airport will have more people on duty today than usual.

• At Detroit’s metro airport, spokesman Michael Conway told the Detroit Free Press that “everybody at the airport is on alert,” but wouldn’t offer further details.

• New Yorkers will see extra police at airports, bridges and Ground Zero.

Amtrak has raised its state of alert by ensuring it is fully staffed with police teams that use bomb-sniffing dogs and other security specialists, Amtrak spokesman Steve Kulm told Post reporter Ann Scott Tyson.

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