When your LO no longer takes a bottle or pacifier and rockabye baby lullabies aren't working. Or Web end the elusive and dangerous car bfing session didn't work. Try this.
Put your head over their head, your one arm underneath their back and just give some warmth and start shushing. Almost like you're hugging them.
After about almost an hour of crying / whining this put my 16 month old instantly to sleep.
What other "out of the box" tactics have worked for you to get a toddler to sleep in the car during a long road trip?