No limit to the amount of hours you can work shunting, as long as you don’t drive an in scope vehicle during any fixed week. So yes if the hourly rate is good and you want to work 6 or 7 12 hour shifts every day then it can be possible. Why anyone would want to though is beyond me working 6 or 7 12 hour shifts week in week out. I did shunting 60 hours every week for 13 weeks and felt like I was never not at work or asleep.
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