How does Scout end up in the yard in front of the Radley house?

Scout ended up in front of the Radley house by rolling there in a tire.

The tire bumped on gravel, skeetered across the road, crashed into a barrier and popped me like a cork onto pavement. Dizzy and nauseated, I lay on the cement and shook my head still, pounded my ears to silence, and heard Jem’s voice: “Scout, get away from there, come on!” I raised my head and stared at the Radley Place steps in front of me. I froze. “Come on, Scout, don’t just lie there!” Jem was screaming. “Get up, can’tcha?” I got to my feet, trembling as I thawed.