one-way dead end

I drove all the way wrong down a one-way street.
When I got to the end, I saw the sign 

and I was surprised.

Nothing special down here! Why did the law
with its arrows and lines try 
to keep us all out? What were they even 
protecting, then?

And...

...how does anyone come to such end? 
Except by coming the wrong way 
down! Then I saw 

with the corner, then front of my eye

this tricky little side-slip squick of a road! 
A hole in the cul-de-sac, in through which
I guess
trickles every little bit of the traffic load
down this back-tucked away little
corner of maze. Finding the secret path into,
going all one way like a dare and a bet.
And getting out of it - who knows?

Do you?