The light rail system already allows cyclists to bring their bikes on board during off-peak hours.
Ms. Rosborough said state officials are continuing to discuss the policy, which will need revisions as light rail ridership increases.
From Hunt Valley, cyclists would ride the light rail 21 miles south through Baltimore to the Linthicum station, and from there along a 2 1/2 -mile spur to Baltimore-Washington International Airport.
That spur is scheduled for completion in 1996, Ms. Rosborough said.
At BWI, they would remount their bikes and head out on a 10-mile airport circumference trail now under construction by the state Aviation Administration and the State Highway Administration.
The first segment of the BWI trail should be completed in October, said airport spokeswoman Adrienne Walker-Pittman. By next spring, there should be a completed 4-mile trail segment from Linthicum to the north end of the B&A trail at Dorsey Road and Central Avenue in Glen Burnie.
Cyclists may also ride light rail to the Cromwell Station, its current southern terminus at Dorsey Road, and pick up the B&A Trail there.
In time, the BWI trail will also provide cyclists with a link from the B&A trail or the light rail system to trails in the Patapsco Valley State Park northwest of the airport.