I'm assuming you're right at the start of the level. On the pillars by the trackside, you'll find symbols/ornaments. "Looking" at these will bring up the option to"Use" them. One will cause a bridge to extend across the track.
The other place you might be is on a platform, later in that level, where you've been attacked by enemies from behind "laser" barriers. You can just walk around this area, between the barrier and the track. It doesn't look like you can but it's easy, even in the mech.
I haven't got the game loaded at the moment, so I can't post a screenie. If you're really stuck, let me know and I'll see what I can do.
Have fun with the ShadowHand