CALIFORNIA - All Scott Wildy said he was trying to do was get to work, but in the process he became a symbol of the growing frustration and anger among bicyclists who commute on Caltrain.

Biking to and from Caltrain has become so popular that cyclists are regularly kept from boarding when space on the trains for their two-wheelers runs out.

When Wildy boarded a train last week with his bike, he said a conductor told him to get off, that there was no more room. But the 39-year-old Stanford information technology employee found a place to park his bike on a rack and he refused to leave. He ended up in handcuffs and under arrest.

"I just couldn't believe it. I was just trying to catch a train to get to work," Wildy said.

Caltrain, the commuter line that runs from Gilroy to San Francisco, has seen its trains become more crowded as ridership has spiked to nearly 45,000 boardings a day. On Thursday, the agency's governing board will consider a plan on how to deal with the growing number of bicyclists.

No one knows for sure how many bikers get bumped, but in September 2007, the only time Caltrain gathered such data, 51 out of 2,400 cyclists were left behind during a single day. Caltrain representatives and bike advocates say they think the problem has gotten worse.