It looks okay to me: realistic and neatly done, but I'm not a civil or structural engineer so I don't know the details.  Nice bridge though . . . 

Well done!

Peter

I don't have anything that I have done yet but maybe these pics of the real deal would be of some help.  Not the greatest but.....

http://www.railpictures.net/vi...id=521530&nseq=0

http://www.railpictures.net/vi...=514375&nseq=451

Rockstar, If you are looking for Backheads which hold the unstable hillside from sliding off a hill where you transition to a bridge ,both Scenic Express and Dave Hikel sell these parts for bridge systems.

Jack

Looks very good as is.

Looks to me like yours is close to the real thing in the links posted by N&W Class J above.

As others have said, it looks good enough to me, but typically an abutment would be constructed to sure up the slope on each side and give a stable base for the bridge that would then be built to cross from abutment to abutment. At least this has been my experience with road design and construction - it may be different for railroads, but from what I have seen, it looks like the railroads typically employ this same design to their bridges.

I built a wood abutment on each side of mine, as some have said above. You have already put the that in your contours at each end. When you look at my pictures and yours -I really don't see any difference in the effect. Nicely done!

Thanks for the positive feedback guys.Chris:Thanks for the pics.of the real deal.I like the first one.I think I just have some minor tweaking to do.I also plan on weathering the O scale track.Turtle:awesome trestle build!,Nick

Looks real good.

NIck

Nice transition !!!

I like it.

Here's our club's trestle for a look...

It looks fine.

If you must, it looks like you could slip in another timber under the track transition cribbing, to hold back ballast.

If the land remains "rock", I see even less reason for any OCD here. 

Bridge / Trestle, looks great, a big plus for your layout & train room.

looks fine, maybe I would add a retaining wall were the roadbed ends and the bridge starts.... I added some wild life sleeping under the bridge....