The campaign visit of Presidential candidate Barack Obama is expected to cause traffic jams in the Rose Quarter Friday morning and drivers were warned to avoid the area if possible.

Obama will be speaking at Portland’s Memorial Coliseum starting at 9:30 a.m., but congestion was expected to begin bright and early at 6 a.m.

Authorities recommend that people who are heading to the coliseum to hear Obama speak use public transit, bike or carpool to the event, if at all possible.

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Off-site parking locations will also be available at the Oregon Convention Center, EXPO Center, Lloyd Center Cinemas and NE 7th Avenue/Multnomah parking facilities.

You can check the Rose Quarter Web site for more information about event specific transportation recommendations, or TriMet's Web site for public transit information and LloydTMA for additional transportation options.