No, a 45 minute DRIVE commute is not perfect to run to work. Due to it being on A roads with no pavements the minimum distance I could run to work is 13 miles. With a rucksack full of all my stuff. Uphill. This would take the best part of 2 hours. We have no showers at work. Plus I'd have to eat before a run that long, and digest it. I'd have to get up at 5am. I know some folks on these forums do that, but I am sooooo not a morning person.
If I don't travel to the Notts AC invervals session then I'd have to travel somewhere else to run them, as I live in side-street hell. You can't run more than 20m without having to cross a road where I live. And I definitely run them better in a group than I do on my own. I drive to the river/canal for my LSR because VLM is flat and where I live is decidedly non-flat. Specificity!
How much money is wasted on the commute? I spend about £20 a week on petrol in total, which is the drive to work as well as driving to other places. There was a time when I could blag a lift to work and run home, but the girl I used to car share with rather selfishly got pregnant and had twins, resulting in no more car share opportunities. I did try getting public transport to work once so that I could run home in the evening, but it took 2 and a half hours and cost me £6.40 one way.