Is there a way to change the collider offset of the sprite shape in runtime?

I'm making a game where I want there to be a road with edge colliders on each side. The sprite shape allows one collider, when I add another it doesn't line up with the side. I tried to solve this by writing a script referencing the sprite shape controller so that I can duplicate the edge and move it to the other side by multiplying the offset by -1, but referencing the isn't working. Is there a way to modify the values of the sprite shape controller, or can I not do that?