Carts should be placed directly at the curb or roadway and AT LEAST three feet apart from each other or other objects (like trees, mailboxes, lamp posts and parked cars) so the mechanism on the truck can reach each cart. The cart handle should be toward your house.
If cars park in front or there are objects in the way, the truck driver will determine if they need to get out of the truck and move the cart so that they can empty it.