(Portland, OR)  --  Authorities say a semi was going too fast Tuesday when it rolled onto its side while taking the eastbound off-ramp from the Morrison Bridge in Portland to Martin Luther King Jr. Boulevard.  The truck was carrying a freight container and damaged the railing on the side of the off-ramp.  The off-ramp was closed until tow trucks were able to pull the truck onto its wheels.  There were no reports of injuries from the crash.