Aesthetically, it doesn't make much difference WHAT the new BSB looks like, because the western riverfront will continue to be dominated by that gawdawful, rusting hulk of a railroad bridge. Under the law as it stands, the states have no authority to demand upgrades or force the RRs to make their bridges conform to road-bridge standards. They are governed by federal standards (written mostly by the RRs themselves) that address only the structural integrity, not looks. That's why the RR bridges can rust and crumble to an extent that would not be allowed on bridges that carry cars.