That depends on how long you commute is though doesnt it! I'm fairly fit, but doing 20 miles each way 5 days a week would be a bit too much for me. If Amanda couldnt give me a lift 2 days a week, I'd be doing shorter stints and taking the train for bits of it. Dont assume people have only come a mile or two justo get the train. I will agree that most probably have and should try cycling further, but not everyone can do the full trip. Also if trains werent so f'in packed, it wouldnt be an issue, afterall it wasnt long ago when cyclists had a whole carrige to themselves
After all you have a car - why not use that rather than a packed train