We call het pied markers "railroad tracks" because it looks like thick, dark, railroad tracks running down both sides of the belly near the tail. The last 1/4 of the belly or less, leading to vent. It is not possible het pied markers if the entire belly is marked like that one is. Even if that snake did have belly markings like this, many normals and morphs have this. Having RR tracks is not an indicator of carrying the pied gene.
Just some info...
Very pretty little BP by the way.