I believe Iowa is in the same boat as Ontario. Apparently they don't use Clearview either. Don't have a picture.
If I understand correctly, Ontario only experimented with Clearview, and never embarked on full-throttle adoption of it. Iowa differs from this to the extent that Clearview was the actual standard for a number of years. (I continue to monitor Iowa DOT lettings and the EDMS and although there have been one or two signing contracts with Clearview, probably because the plans had been sitting on the shelf for a while, nearly all new signing is in the FHWA alphabet series.)
And, member Pink Jazz stated that Arizona may also have dumped Clearview. No confirmation though.
Pink Jazz has cited field installations, which could very well be contractor errors (cf. Roadman's post upthread). I am seeing very little evidence of Clearview being dumped in recent Arizona DOT signing plans. These include corrected as-builts (redline date of February 27, 2015) for the I-10 Craycroft-to-I-19 job (TRACS H855601C) as well as the SR 210 job (TRACS H855401C), all of which use Clearview.
The one plans set I have seen that tends to suggest Clearview is being dumped is a SR 264 Burnside-Fish Wash job (TRACS H824601C) for which early-stage draft plans have been prepared as of last month. I'm hesitant to draw inferences from it since the signing plans are pretty rough, with distance expressions in mixed case (e.g. "4 Miles" instead of "4
MILES").