I got a chance to check out the new alignment and construction on SR 429 today. Not sure if this was mentioned earlier in the thread, so I'll just post my observations.
As of today, there is still not complete direct access to/from 429 and 414. 429 at the 414 interchange is reduced to one lane in each direction, and lanes from 414 (when they open) join to 429 to make it two lanes in each direction again.
On 429 north of 414 (both directions) there are new mileposts that reference SR 451. South of the interchange, the mileposts are the same, but have SR 429 on them. The mileposts are similar to Louisiana's where they post the direction, road shield, and mile number on a "uni-sign". The ones on 429 (and on "unmarked" 451) appear to be posted every half mile. I haven't gotten a chance to drive on any other toll roads yet (except for the Turnpike) on this trip, but I will probably get a chance to drive on 408 so I'll report if 408 has these new mileposts as well.
On 429 as well as on "unmarked" 451, the reassurance markers are also uni-signs, but I didn't catch any 451 reassurance markers - the 451 number is only on the mileposts.
It appears a new sign bridge is going up just north of the Forest Park toll barrier. The sign bridge has BGSs for CR 437 (or 437A) on one side and the E-Pass/Cash lanes signs for the other side. I didn't get a chance to get a picture of these because the sign bridge was sideways in the median of the roadway.
I took some other miscellaneous pictures of the mileposts, reassurance markers, and construction and I'll post these as soon as I get them from my camera.