The Prince William County commuter bus system will present a proposal to its operations board next week to add buses in an effort to alleviate chronic overcrowding.

The Potomac Rappahannock Transportation Commission board will consider a proposal on July 7 to gradually add eight new OmniRide morning trips and three new afternoon trips. PRTC officials said almost 20 percent of all OmniRide trips are “chronically” overcrowded and offer standing room only for passengers commuting into Washington.

PRTC has not been able to expand service because its entire fleet is being used and funding was not available, PRTC officials said. Now, however, the situation has changed.

In June, PRTC received four new federally funded commuter buses to replace older buses. PRTC officials said instead of retiring the buses as previously planned, they will keep three of them in service.

By making some budget adjustments, PRTC officials said they have been able to find additional revenue for service hours. Fare revenue also was higher than expected and will go toward funding the additional trips, PRTC officials said.

If the PRTC board approves the staff recommendation, the new bus trips will be added starting at the end of July. The bus system will advertise the new times, which are yet to be determined, through its Web site, posters and public announcements.