Moving Up/Down to a Line Path

How exactly would I go about having a character that moves forward on a line path have the ability to move to the path above or below itself. If I have 3 lines and the character starts on the middle path (bullet behavior with line path sprite in the middle), how do I set it up so that the character goes UP/DOWN to another line path? I'm guessing the movement system is similar to Subway Surfer. Any help would be appreciated.

I made it up and down with up/down arrow key.

drive.google.com/open

p/s : I didn't add bullet behavior yet.

I made it up and down with up/down arrow key.

https://drive.google.com/open?id=1gGGJ1OJsQ8orwkRVQPsw4_3OJD6VYFjI

p/s : I didn't add bullet behavior yet.

This does work well. How would I make it so that the sprite gradually moves up or down to the line path? I'm not sure how to get lerp to work properly, along with the sprite having the line path in the center of it just like it is now.

Sorry for lately reply, you can change current set Y to this one :

drive.google.com/open

Cheers.

Sorry for lately reply, you can change current set Y to this one :

https://drive.google.com/open?id=1nS0YoT0vqh9ueFfTab4qPL4qsWnyepYc

Cheers.

Yes, that's what I was looking for. Thanks again.