How do you know when you are at max angle on the trailer?

2oldman wrote:
Any chance there's a driveway across the street you could pull into to make it straighter?

I wish. 24' trailer and 20' truck. Normal 2 way street that becomes 1 way when people are parked on either side. Only luck I have on my side is a fire hydrant that guarantees the space 45 degree across the street is always empty.