It has to pass tunnel test on three tracks side by side and the tunneled track is a little higher than the other two tracks for the loop. Will this odd looking support work?
You might be better off with a tunnel intrusion, depending on how high the seats are on the train is that's being used. Alternatively, if you stick with what you have here, the pain problem is reinforcing the side structures and ensuring the taller horizontal beam dies not have a problem with the wheel assemblies or any other part of the train. (Which, it looks like it's fine unless you have a spinning coaster.)
The arrangement of having the higher section resting above the lower section means that the lower section is a cantilever. This means that the higher section is redundant in this arrangement.
With the style of supports you're going for it makes supporting it in its current state pretty much impossible (you'd need a pretty large section to ensure it wasn't going to bend too much.
Is there any scope for raising the dip section of the track and having a continuous spanning beam that isn't on two levels? It would be acceptable to have an angled beam, just so long as its continuous!