In perspective, my commute pattern is as follows;
On earlies my commute takes 35mins by car. No traffic, empty fast roads
Rush hour it's 45mins to hour tops.
By train its 45mins. I prefer the train as I have that 45mins to myself. Powernap, listen to music, read training materials. Also saving money in fuel and running costs of the car.
You could live 10mins from the depot but still occur 1-2hr drive. (Trust me it's happened several times to me before) so I wouldn't factor too heavily on that. It's more of an inconvenience. Also with non-techicnal skills your trained to come into work earlier and allow more time for situations like this. (Bit self-explanatory)
All I would add is, after doing an early and driving all day then driving home in lunchtime traffic it's a killer. Although I make it stress free and take my time in getting home. I'm heading home not to work, so no need to rush and stress myself out
Just carry on with what your planning to do and allow time for traffic. So if your allowed up to 60mins commute time then 50mins is fine. If you have to live 35mins from depot then you would need to move nearer