player is submerged in a prefab

I am making a runner game in unity3D, there is a road prefab I have taken from the asset store. The player is submerged in the road when I run the game… pls can anyone help me.

Add a collider to the prefab; whenever you import and object, it only shows the model, but there is no collider. So, if you add a collider to the road and edit it that should help.