I trained L to transition car/pram to cot... basically did shush/pat from car to bed, then once in bed til he settled (gradually reduced the patting in the cot as he learned to settle in there) and even now I just tell him I've got him and I'm carrying him to bed, put him in and he sleeps
The only thing is the timeframe - any more than about 10-15mins sleep in the car and the transfer is a more like 50% success rate than the 99% success rate with the minimal sleep time in the car.
If I was doing cot to pram transition after only 10min in the cot, I'd just put LO straight in the pram and walk a little slower or take a longer route... especially if I was doing a catnap either end of the day with a longer nap around lunch time.