N.L.
Oh boy I so know about your frustrations. When my daughter was that age and I would commute home from my Mom’s it was the same thing. She would fall asleep and then crankiness proceeded. At first I was thinking my poor little girl is so tired and I would let her sleep. It was how cranky she was when she had to wake up ½ hr later that I couldn’t take the guilt anymore!! I felt so bad for her.
I did a couple of things: I had one of those cd’s in my car of Children’s favorite songs. The one with stuff like Old McDonald, If your happy and you know it…stuff that made her engage. I did most the singing, and over did it a bit (I'm sure ppl in the other cars thought I was a nut case) but that’s o.k.!
Next I bought sugar free lollipops which I would give to her about 5 min into our car ride. That way I knew she would be sucking away at it the entire car ride!
It worked!!