Maybe the 4-lane segments of Interstate 5 in the Portland-area should have been 6 lanes from the time the freeway was first constructed. Freeways with 4 lanes within an urban area such as Portland seems to be too little capacity to me, unless the freeway is a spur route.
In most cities, a freeway like this would have 8 lanes.
That's the amazing part about this debate. The climate warriors in Portland are like NO WE CAN'T HAVE ANY FREEWAY BEYOND 4 LANES OR THE PLANET WILL DIE but, you know, have they been anywhere else!?
Yep, Portland's freeways are really narrow compared to all other cities on the west coast. Most of them are just 3 lanes in each direction (aside from the part on I-5 between I-205 and OR 217, which is 4-5 lanes in each direction), which is the absolute minimum for an urban freeway IMO.
I really don't have much of a problem with widening this stretch of freeway, but it's just crazy that widening just a mile of road is going to cost a billion dollars.