Answer:
I can run but not walk. Wherever I go thought follows close behind.
What can you hold in your right hand but not in your left hand?
I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown. My favorite colors are yellow and white and I love stripes and dashed lines.
I must be broken before you can use me.
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.