Reminds me of the truck routes in Auburn (
https://forum.travelmapping.net/index.php?topic=5218.msg29361#msg29361), which I believe weren't added because they were signed differently going different directions (similar to Minden).
IMO, there should be at least points added where these "truck routes" intersect the mainline routes (33Rd for NE 74/US 34/US 6 for the Minden one, and ESt for US 136 + 9thSt for US 75 for the Auburn one) so if someone uses it as a bypass they can cut off their travels on the mainline routes appropriately.