I wouldn't do it. But things that make help to decide if it would be right for your DC include:
How reliable is the public transport?
How crowded is the public transport?
Will your DC get travel sick from reading in a bus/train/car?
How much homework will your DC get? Will it have to be done at home, or are there facilities to do it at school while you are at work?
Is it likely that your DC will need or want to attend lessons, activities or events before school or at weekends? Will you be able to arrange transport for them?
How will your DC get to school if you are ill/on a work trip or course elsewhere?
Will your DC be able to handle the journey with a chest infection/sprained ankle or other health issue that isn't bad enough to miss school for?
What is the culture around friendship groups at the school? Would it be considered bad form for your DC to visit friends without reciprocating?
Will most other children live near the school, or are longish commutes fairly normal?
Will your distance from the school, or responsibilities to your other children mean that your DC will miss out on some opportunities offered by the school?
At what age will DC be able to do the journey without you?
What will your back up plan be for transport problems?
How will these answers change as DC gets older? Will a teenage DC be able to meet up with friends at weekends?
Will your transport arrangements fit in with getting your other children to school?