Forcing Checkpoints

Is the ability to force the game to checkpoint gone in Halo 4? I know in previous Halo games, when you just get out of combat it will checkpoint or when you make yourself take damage (grenade) then wait a bit it will checkpoint. This seems to be an absent feature in Halo 4 which is extremely annoying as you can go as far back as 30 minutes worth of time because of death. There are times the game won’t checkpoint at a “checkpoint area” which seems to be the only areas you can get checkpoints and thus, without being able to force one or get one from getting out of combat… again, you can be sent back quite a way.

Anyone know how to force a checkpoint in Halo 4, or is it impossible?