Cruel to be kind or AIBU?

If the trial is tonight she may not like it ( or they may not think she is suitable) so let her try it and see where it goes.
Nowadays parents are much more careful about letting children out, but at 17 I had been working full time in London fir 2 years and then still 17 left Home and moved to London. At 18 children go off to university. Parents have no clue what their children are up to,
I understand you are nervous but see first how things go this evening, summer and light nights are on the way. She might not even like it.

No I don't think you are being unreasonable at all. I was exactly the same when my daughter was that age and before she passed her driving test. I worried terribly when she travelled home late at night, thinking all manner of things could happen to her. My daughter told me not to worry as there were loads of people on the trains, but she still had a mile walk from the station. The only thing I can suggest is that she get a taxi if your husband is unable to collect her, although it may not be worth her working if she has to pay out for one. Do mention your concerns to her, as the very least, it may make her a little more aware of her vulnerability, as I know when I was that age I didn't worry one bit about walking home late at night.

Could she cycle, or use a moped? She would be less vulnerable that way.

Yes. On top of her travel costs getting to and from college 3 days a week. It would be a stretch ?

Gosh, I'm with you there icbn2802.
Must admit I wouldn't be comfortable with my 20yr old GD travelling to and fro as you describe.
Is your daughter really keen on the job? If yes, you may need to express your concerns but trust her judgement.
If she's not keen on the job she may be relieved to hear your concerns and 'use them' as an excuse not to go?
Is it too far for a taxi (especially for the homeward journey) for a few 'shifts' when your hubby is unable to help?
If she takes the job and is happy there may be a fellow worker with whom she could travel and share expenses but obviously she won't know that for a while.
I will be thinking of you both this evening

Is the cost of a taxi to bring her home difficult for you ?