I am re-using a bridge abutment design from my N scale layout re-size for TT Scale and adjusted for the layout.
Test fit of abutments and bridge
Then added a primer sealer to the abutments. Once these are dry I will apply a soupy mixture of joint compound and paint.
This is what my N Scale one looks like
I also got four TT Scale bridge shoes coming from Shapeways (photos of my N Scale ones)