I used to live next to an interstate.
These white noise machines are GOLD:
There are several brands, so don't feel like you need this particular one.
Create any water features you can indoors and/or outside. These create background sound to drown it out.
Thick fabrics on the walls facing the sound can help if you can't afford to do new windows right now. I believe they also sell window inserts that deafen sound, as I was looking into them at one time.
To your particular issue, since it's a specific song (maybe?), a repeating catalog of songs, or at least specific frequencies/tones every time, and it's at specific times, I wonder if you could rig up some sort of noise cancelling device or sound to play at those exact times in your bedroom?
It seems like a lot of toxicity warnings are based on an industrial scale so I'm curious about the impact of using a couple printed boxes, versus the impact of the next laziest option: synthetic landscaping "fabric" or that thick black plastic material.