The Minnesota State Patrol says I-35W is closed in both directions north and south of downtown Minneapolis. Alternate routes include I-94 and Highway 280.
The State Patrol says there are driving restrictions on some parts of Washington and University avenues. Officials are advising motorists to avoid the area of the bridge collapse until further notice.
The MnDOT Web site will be updated to contain current information on road closures.
The city of Minneapolis says it will update its Web site with road closures as well. Metro Transit says it will offer additional bus service from its north metro park-and-ride locations Thursday morning to help reduce congestion resulting from the Interstate 35W bridge collapse.
Metro Transit says 25 extra buses will be put into service from 6 a.m. to 9 a.m. to supplement existing transit service from the park-and-ride locations. There will be staff on hand to help new customers needing assistance.
Afternoon service to those north locations also will be beefed up. Plans are still evolving for additional service beyond Thursday.
The University of Minnesota says all classes will be held as usual Thursday, and university operations will be normal despite the bridge collapse that will divert traffic from one route to the university.
University vice president Kathleen O'Brien says officials have determined that the campus is accessible by a number of routes, but students, staff and faculty should plan for possible delays due to traffic rerouting.
The Minnesota Twins have cancelled their Thursday game that was to be at the Metrodome in downtown Minneapolis, along with the groundbreaking ceremony for the new stadium.
The Archdiocese of St. Paul and Minneapolis has scheduled two prayer services at noon Thursday for victims of the bridge collapse and their families.
The Minneapolis service will be at St. Olaf Catholic Church downtown, and the St. Paul service will be at the Cathedral of St. Paul.
The archdiocese says prayers of thanks also will be offered for survivors and rescuers.
People of all faiths are welcome at the services.
(The Associated Press contributed to this report)