I am currently Making a new train set layout and I have 2 sets of 4% risers and 1" Risers. I want to have a way to include bridges so i can make a river flow through a part of my layout. I still dont know if the Bridges need to have a 0% slope or 4% slope on the risers. I am running two tracks one 4% and one 0% . Please give me suggestions and tips! thanks!

The is a continuation of the sound control tests I started in the Foam Drum Topic. For this set of tests I built an all new rig that will let me do side by side comparisons of track mounting options:

I plan to model a modern transload terminal that has several tracks embedded in concrete, both on the outside and between the rails.  I'll be using Atlas C-83 flex with "wooden" ties.

I've been trying to figure out what kind of sheet product would be best to model the concrete - fun foam, styrene, or ???  I don't want to mess with plaster or grout.

Any suggestions on material and / or technique?  My main concern is that the pavement be level both inside and outside the rails.

There's lots of great discussion on this site now about foam / sound, etc.  One thing keeps coming up; that is, it appears that when ballast is glued down to the roadbed either using diluted white glue or matt medium it greatly increased the transfer of sound and the overall sound level.