Regarding the double-track bridges... Look for bridges that begin with YR:
YR Bridge Plate Deck 1 Track Black,<kuid2:430547:76:1>
YR Bridge Plate Deck 2 Track,<kuid2:430547:21000:4>
YR Bridge Plate Deck 1 Track,<kuid2:430547:21001:5>
YR Bridge Trestle,<kuid2:430547:101595:1>
YR Bridge Plate Deck 1 Track Dark,<kuid2:430547:230032:5>
YR Bridge Plate Girder 1 Track,<kuid2:430547:230045:3>
YR Bridge Plate Girder 2 Track,<kuid2:430547:230047:2>
YR Bridge Plate Deck 2 Track Light,<kuid2:430547:230056:1>
YR Bridge Plate Deck 1 Track Light,<kuid2:430547:230057:1>
YR Bridge Pratt Truss 1 Track,<kuid2:430547:230058:1>
There are also JJS Plate Girder and Pratt Truss bridges as well. For wooden bridges, there are hundreds of them, including those by Ben Dorsey.
Getting back to the yellow circles vs the white circles.... I told you this in my initial post to you when I was explaining, in detail, on how to level terrain under track on a grade. Apparently, you didn't read it or ignored my post.
From the second page, post #21,
"Now to keep your track flat, so it doesn't bump all over the place like the "Toonerville Trolley", you need to lock the track points. While in the track objects pull-out, click on the advanced menu (it pops up below). Click on the height adjustment tool in the upper left part, and then click near your spline points to level the track. The spline circles will turn yellow once they are locked. Periodically check the grade and adjust the height of your track splines so it's not too steep, if you want."
John
YR Bridge Plate Deck 1 Track Black,<kuid2:430547:76:1>
YR Bridge Plate Deck 2 Track,<kuid2:430547:21000:4>
YR Bridge Plate Deck 1 Track,<kuid2:430547:21001:5>
YR Bridge Trestle,<kuid2:430547:101595:1>
YR Bridge Plate Deck 1 Track Dark,<kuid2:430547:230032:5>
YR Bridge Plate Girder 1 Track,<kuid2:430547:230045:3>
YR Bridge Plate Girder 2 Track,<kuid2:430547:230047:2>
YR Bridge Plate Deck 2 Track Light,<kuid2:430547:230056:1>
YR Bridge Plate Deck 1 Track Light,<kuid2:430547:230057:1>
YR Bridge Pratt Truss 1 Track,<kuid2:430547:230058:1>
There are also JJS Plate Girder and Pratt Truss bridges as well. For wooden bridges, there are hundreds of them, including those by Ben Dorsey.
Getting back to the yellow circles vs the white circles.... I told you this in my initial post to you when I was explaining, in detail, on how to level terrain under track on a grade. Apparently, you didn't read it or ignored my post.
From the second page, post #21,
"Now to keep your track flat, so it doesn't bump all over the place like the "Toonerville Trolley", you need to lock the track points. While in the track objects pull-out, click on the advanced menu (it pops up below). Click on the height adjustment tool in the upper left part, and then click near your spline points to level the track. The spline circles will turn yellow once they are locked. Periodically check the grade and adjust the height of your track splines so it's not too steep, if you want."
John