Is there a way to make vehicles jump in the 1.2 routing method because from the video it looks like it won't be possible No

No.

They could jump, at least with janky terrain, like rough terrain.

You have dunes, you have bumps in the road, making them elevate and do small skips.

Since all surfaces require vehicles to be flat now, you could maybe achieve some very minuscule bumps, slash jumps, but otherwise it's been ironed out to the point where it is, by intent, no longer possible, for the sake of having vehicles behave much better.

just consistently getting from point a to point b when rideable hogs no uh can we get a build mode for train tracks that make them follow terrain foundations at build time like new vehicle parts do oh that's something that actually could you know because vehicle parts took a lot from train parts and now when they are the new fast thing then maybe trains could also take the new best things from vehicles and make that their current thing maybe qa site