I'm going to guess this is the area in question also:
https://www.google.com/maps/place/G...87d4a5a73f:0xc3a4986d59fe1ec0!5m1!1e3!6m1!1e1
As you can see, we are not talking about the intersection of Lincoln Way and Duff here.
There is another double-crossing nearer to Adel:
https://www.google.com/maps/place/G...87d4a5a73f:0xc3a4986d59fe1ec0!5m1!1e3!6m1!1e1
In this case, the NE crossing is paved and does have some auto traffic. However, you can see any potential traffic a long ways off. The second SW crossing is a very tricky loose gravel crossing.
Just wanted to note that a few years ago a biker died at the intersection outside of Adel that you posted...He didn't stop. He was heading west on the trail and ran into a vehicle traveling north on the paved road.