Travelers headed south out of Baltimore this weekend should consider alternatives to the Woodrow Wilson Bridge because lane closings could back up traffic well into Maryland, highway officials say.

John Undeland, spokesman for the Woodrow Wilson Bridge Project, said motorists can expect "major, major delays" on the southbound Capital Beltway because all but one lane of the four lanes of  Inner Loop will be  closed at the bridge across Cameron Run on the Alexandria, Va., side from Friday night to early Monday morning. Other sections will have two lanes closed.

Backups could extend 10-15 miles and last up  to 90 minutes, officials warned. The closings will  be in effect from 9 p.m. Friday to 5 a.m. Monday.

The 1961 Cameron Run bridge is slated for replacement of the Woodrow Wilson Bridge Project, which has already completed demolition of the old bridge over the Potomac River and construction of a new, wider span.

Underland suggested that motorists  heading south on Interstate 95 use the American Legion Bridge over the  Potomac on the western side of the Capital Beltway. Another alternative for those traveling to Fredericksburg, Va., and places south of there is to use U.S. 301 through Southern Maryland.