I received notice that I am stuck in corral A at the Green starting line under the bridge. I have no desire to be Green and prefer Orange due to the less congestion on 4th Avenue. Can a runner in corral A go to the Orange corral B and be allowed in by the volunteers? I was in Orange last year and it was less congested on our side of 4th Avenue as compared to the right side with both Blue and Green jammed into a relatively narrow road.