If I can’t make a U-turn completely, I don’t try to make it. I’ll go up until I find a place where I can like a dedicated left turn lane that does have enough space to do a U-turn or I find a driveway/business where I can safely do one, making sure no cops are nearby to ticket me if it illegal.

Or I’ll do the 3 left/rights to perform an alternative to a U-turn if it’s that busy of a city/town which can effectively get what you want in a different way. Takes a little bit extra, but is worth it to avoid a ticket or an accident.