(Portland, OR)  --  The Morrison Bridge will have room only for two lanes of traffic, starting today.  Transportation officials say the crumbling deck of the lift span will be repaired and should be finished during October.  The estimated 50-thousand drivers that travel the Morrison Bridge daily will be squeezed into one lane in each direction, unless some of them elect to take an alternate route.  Officials say freeway ramps to and from the bridge will remain open, and the south side path will be clear for cyclists and pedestrians.