Sound memory

Those of you who grew up in the Washington Metropolitan Area at any point prior to the late 80s will most likely know this sound memory. Anyone who drove to the Eastern Shore (Maryland and Delaware) prior to the late 80s will also have this memory. When was the last time you heard a consistent ka-thunk, ka-thunk, ka-thunk, or whap, whap, whap, occuring at almost a perfect timing? In particular in the car going about 50 miles an hour down the road? Of course some people may equate that sound with a flat tire but I'm talking about the sound of my mom's AMC Rambler and then her 1980 Ford Fairmont. It was on Rt.50 headed towards Annapolis when the road was still a two lane divided highway that the tires would bump over the seams in the concrete pavement making a ka-thunk, ka-thunk, ka-thunk sound. If it was my dad driving the sound leaned toward the whap, whap, whap mostly because he drove a bit faster. If I here this sound it is an immediate transport to that road, those days and that time. Most times it conjurs up another sound memory. In fact i can hear it in my mind right now. "Welcome to Sports Call, This is Ken Beatrice on WMAL" Mostly I hear that because we drove home on Sundays and my dad listened to WMAL for the Redskins game. I hope to have more of these memories and I hope Wylie is forming some right now.