This poem is amazing. I can see it all very clearly. I am therefore thinking about an altar between the tracks. When I think of tracks I see a long trail heading off into the horizon with slats going across and two rails, but I don’t see anything sticking up in the middle. I see a platform where you get on the train. I do understand what you are trying to do here with imagery, I think. So, now instead of an altar, a grave? Just a thought. Also, there are two thats in the first line.