One of those locations was the Route 155 overpass in Havre de Grace, where a crane held a large American flag over the railing and onlookers waved.

As the bikers left the Maryland House to resume their trip north, traffic on the southbound side of the interstate was backed up.

Motorists had been forewarned by the media and through state traffic advisories, as well as message boards along the convoy's route, to expect possible traffic delays and ramp closures to interstate highways.

Glassboro, N.J., resident Mario Marra, an avid biker for over 20 years, said he learned about the ride through various motorcycle clubs.

"Like" exploreharford's Facebook page

Marra had started his day in his home state, rode down south to the Pentagon and was one of the first bikers to arrive at the Maryland House Saturday morning.

"Any good cause I'm part of," he said.

While Marra wasn't personally affected by the Sept. 11 attacks, he has several friends who are police officers and EMTs. More recently, one of Marra's friends, who served as an Army Ranger, was killed in Afghanistan.

This ride was for them and their families, he said, adding: "The biker community is a great group of people."

The sponsor of Saturday's ride, America's 911 Foundation, is a nonprofit organization founded in 2003 and aim to help families affected by the attacks and those who continue to put their lives in danger to help others.

According to the website,the organization has given scholarships to more than 70 children of first responders totaling $180,000. The foundation has also donated more than $250,000 to first responder departments and their families.

In addition, this year 15 college scholarships of $2,000 each will be awarded through the foundation.