Bob Gentile: Bridges, love building Howe Truss Compression Bridge. One thing to keep in mind, it would be nice to have a bridge that goes with your Garden Railroad era. If you are modeling modern and running Diesels, I guess metal bridges would look nice. My choice of wood material would be redwood, cedar or cypress in that order. I have a romance with Howe Truss bridges, just something about them that catches the eye. I have built several of them will over 6 ft and with a double track main line.

Larry Bangle: I took a metal wall stud. laid it open side up,and slid a 1x4x4 block at track joints and each end. before I slid the track and 1x4's in, I attached (screwed) a 2"x6"x8" cedar block on each end for embutments. The holes in the stud let rain water drain out. the 1x4s make the track stay in the trough perfectly,as the curve on the stud grips the ties on both sides.It was supposed to be temporary,but it worked so well,I sprayed it brown and it has been in place for two years with no problems. It is not a high bridge (about 6" off the ground) but it lets all surface water run off a 10' area that otherwise would be wet area holding rain water. The cost is only the price of the metal stud and paint.

Mike Evans: Sometimes it's best to just keep it simple. I have used a simple redwood plank for the track base and then fastened 3" wide thin redwood strips to the edges; looks like a regular thru girder bridge (from over 10 ft).