Green wool makes u auto sit in it. There are also other things you can do with MM other than transportation. You may use storage chests on an inf. loop to auto pickup items on the floor within 8 blocks of it. If the storage minecart is still, it will not collect them. If an empty minecart is left empty for 45 mins, it will return back to your inventory. If there are items in the way of a full storage cart, or a minecart, it will push the entities off the track to the right I believe.
green wool should go after obby. Once you place cart on obby, hit button to make cart go, the cart will go over greenwool and it will make u go in the cart
