There was what I thought was a timing mat prior to the main finish line which I assumed was for those of us that had started on the left and taken a longer route.
Did I make my first sub 1:30? My Garmin says no, official says yes, guess I'll never know for sure.
One thing I do know is I'll never start on the left again, I spent so long weaving around slow runners from the r/h side it was a joke. I even swore at a couple of them, I was so frustrated. Felt bad after as it wasn't their fault.