<i>fewer downtown exits</i><p>Fewer downtown exits should mean better flow through SR99 because there will be less intra-city traffic clogging lanes. That&#x27;s one of the reasons the Big Dig improved traffic on I-93, they removed a bunch of downtown and South End exits. Of course the Big Dig supplemented that by increasing the capacity of surface streets on and around Atlantic Ave.<p>If Seattle is doing something similar (I&#x27;m not familiar with the specifics of the SR99 project) that should be a bet positive for traffic flow. If not, then, well, sucks to be in Seattle.