Before putting up another batch of pictures, a few observations. It appears, from what I witnessed, that the closure of State Road 37 in Martinsville proceeded smoothly. The number of law enforcement vehicles posted throughout the closure zone was impressive. Both state and local police, in marked and unmarked vehicles. Obviously, INDOT wanted the closure to occur without a hitch and was taking no chances. And that's apparently what transpired. Late in the afternoon on Sunday, January 3, 2020, traffic was running smoothy without backup from I-69 northbound straight onto Morton Ave./State Road 39 in Martinsville. To be sure, traffic was light, but it was a positive sign the detour was working as planned.
On my trip to Martinsville on Sunday, instead of continuing north on I-69 to the detour point, I exited at the I-69/Liberty Church Road interchange and took the new frontage road -- Old SR 37 -- north to Jordan Road and then a left onto Burton Lane, which a mile or so further on intersects with State Road 37. For residents of Martinsville who wish to travel south on I-69, this short work around to the Liberty Church Road interchange might be worthwhile. This way they won't have to negotiate the traffic on Morton Ave./SR 39. And from the traffic I saw on Burton Lane, some drivers were already doing just that. There is one small stretch of Burton Lane that is rough with a number of large potholes. More traffic will only make the situation worse. Hopefully, local authorities of aware of the area and will take steps to mitigate any further degradation. Burton Lane south of SR 37 is a narrow country road, and like many country roads wasn't built to handle truck traffic. If large trucks begin to use it regularly, the road may quickly deteriorate.
I-69 Project; Section 6, Segment 1; Martinsville, Indiana
A RoadSafe team arriving at the recently closed State Road 37/Burton Lane intersection for re-striping work; looking east. For most of 2021, Burton Lane will remain open to cross SR 37. Eventually, the road will be closed off as no interchange or overpass will be built here.

Yup, more work to do. Looking southwest from near the SR 37/Burton Lane crossing toward the closed SR 37/SR 39 interchange.

RoadSafe team members at the SR 37/Burton Lane crossing; looking east.

Getting ready to get to work.

Prep work prior to putting down a double yellow; looking southeast.

Measuring out where the new striping is to be placed.

Grinding off no longer relevant pavement markings.

Mid-range perspective of the re-striping work. Burton Lane remained open throughout the process, although traffic was stopped from time to time.

The road striping equipment truck; looking south. I didn't stick around to see the re-striping job completed because I wanted to take a few snaps of SR 37 from the Grand Valley Blvd. overpass before it got too dark. I posted a few of those photos earlier.

One last one. Another look at SR 37 and the SR 37/SR 39 interchange; looking southwest. In the background, detoured I-69 traffic is running on the newly constructed southbound lanes of future I-69 just north of the bridge over Indian Creek. Northbound, from that point, it's straight ahead onto Morton Ave./SR 39 in Martinsville.
Edit: minor edits for readability; swapped out a photo for a similar but slightly different one.