I do not understand ODOT's refusal to put Spokane or Boise or Salt Lake City as control cities for I-84 (Spokane might be a stretch given it would involve I-82, US 395 and I-90, but it is a major destination for I-84 traffic), but Caltrans considers Portland a control city for I-5 north of Redding, and WSDOT uses Spokane as a control city for I-90 in Seattle (and vice-versa). Maybe it has to do with UDOT removing Portland as a control city at the I-80/I-84 interchange...who knows...
Well, given that Salt Lake City is 760 miles and a metropolitan area away, I get that, but Boise should absolutely be co-signed with The Dalles. I even get Medford as a control for I-5 south through most of the state, but why doesn't any California city show up on a distance sign until you get to at least Ashland. Or why I-5 north can't be co-signed Vancouver / Seattle as a tongue-in-cheek way to get three cities signed in two words.
Redding should be on distance signs from Eugene south. Roseburg, Medford, Redding. Grants Pass, Medford, Redding. Medford, Ashland, Redding. Ashland, Yreka, Redding. Yreka, Redding, Sacramento.
And Boise should be on at least *one* of the distance signs in the Columbia River Gorge, instead of the weird amalgam of Pendleton / La Grande / Baker City / Ontario.
But, ODOT is not exactly known as the highest-functioning of state DOTs. So on we go.