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[SD Mapman]

So it turns out the Lacrosse DDI did resume construction, I just missed it: all of the new stoplights are in place on the south side, and the smaller stoplight posts are in place on the north side median. Given the continuous on and off snow we keep getting every week, I'm not sure when the traffic configuration will change again, but when it does, it should match the DDI pattern instead of the current diamond layout.

Due south of this project, the Lacrosse-Omaha intersection rebuild is in full swing, with all of the signal lights removed (though as of now, two of the four old mast arms are still in place), only one lane in each direction on Omaha, and a westbound-only RIRO with Lacrosse to the north. The south side of the intersection has already been torn up for reconstruction, and the crews were still working through the snow as I drove past this morning on my way to work.

Gotta get as much done as you can before August.

[X99]

As of Friday, the Lacrosse DDI is now open in its final configuration. Still one lane each way for now as the islands and pavement are finished up, but the crossover is now in effect for all traffic and the signals are all active. I've been through it three times so far and almost everything is running smooth, but since the one open lane southbound is the inner lane, there are still some backups with the eastbound on ramp movement.

Edit 5/1: clarifying that as of now, the west side islands (Phase 3B in the original diagram) are complete (and very maroon), but the east side islands (Phase 3A) are still waiting to be built. All of the stoplights are arrow shaped as well, all pointing up. Another interesting part of the new configuration is the stoplights on both directions of both offramps merging onto Lacrosse. Most DDIs to my knowledge add yield signs there, allowing traffic to merge onto the crossroad as openings become available, but in this case you have to wait for the light before you can join the crossroad, even on a right turn.

[SD Mapman]

As of Friday, the Lacrosse DDI is now open in its final configuration. Still one lane each way for now as the islands and pavement are finished up, but the crossover is now in effect for all traffic and the signals are all active. I've been through it three times so far and almost everything is running smooth, but since the one open lane southbound is the inner lane, there are still some backups with the eastbound on ramp movement.

Edit 5/1: clarifying that as of now, the west side islands (Phase 3B in the original diagram) are complete (and very maroon), but the east side islands (Phase 3A) are still waiting to be built. All of the stoplights are arrow shaped as well, all pointing up. Another interesting part of the new configuration is the stoplights on both directions of both offramps merging onto Lacrosse. Most DDIs to my knowledge add yield signs there, allowing traffic to merge onto the crossroad as openings become available, but in this case you have to wait for the light before you can join the crossroad, even on a right turn.

We'll see if that's an SDDOT thing or just because they expect heavy traffic going to the Mall and Rushmore Crossing (for those not familiar with the area those are on opposite sides of I-90). Over in Sioux Falls, they're moving forward with the DDIs at I-29 Exit 77 (41st St) and I-229 Exit 9 (Benson Rd). Of these two I expect the 41st one to have stoplights while the Benson one should just be a yield sign (shouldn't be a DDI based on traffic but better overbuilt than underbuilt IMO). There will also be a DDI at I-90 Exit 406 (Brandon/SD 11) maybe this year we'll see.