The root can be colocated on the egress RSVP-TE router (egress from the signaling point of view). The root can be one hop or more away for the egress RSVP-TE router.
The leaf can be colocated on the ingress RSVP-TE router (ingress from the signaling point of view). The leaf can be one hop or more away downstream from the ingress RSVP-TE router.