Did i do the right thing?

[silvsupratt]

This happened in august, but its been bothering me ever since (before i go on, i was working on a road crew hours away from home and any kind of rescue or rehabilitation at the time was out of the question unfortunately) but as i was moving equipment i noticed a garter had been hit by a car and was laying flat on the road.. Sad? yes. However, the snake was pregnant and by some lucky chance 2 babies were alive and struggling to get out of its stomach. i helped them out and moved them off the highway to a grassy puddle a couple feet away.. Miraculous they survived, i wanted to give them the best chance they could at surviving. But there was 12 hours left in the day still, far from my hotel, and absollutely nothing else i could do.. But was this right? im thinking i should have euthanized them quick and painlessly cause now my concsious is telling me that they more than likely suffered and died in the wild.. Judging by what i just saw, killing them was not even a thought. I love snakes and had the best intentions, but wouldnt mind a little input from the pros