I offer you here at my bridge construction kit from LS2013 to LS2015.
The mod is fully compatible with the new LS. The bridges must be built with the Giants Editor, so are not placeable. I have extensively tested this on my own card as you can see in the pictures. MP should be no question in this Mod.
If you interfere with the road texture, you can simply replace (“Teerdecke.dds” file replacing, ideally with paint.net). The same applies to the railing color, the bridge and the concrete pavement markings.
Brueckenbaukasten V2 (file size = 3 MB)