Arts and Culture Audio Postcard: Racing is Back at Oxford Plains Speedway Maine Public | By Matt Roberts Published May 3, 2017 at 6:04 PM EDT Facebook LinkedIn Email Listen • 2:57 Wikimedia CommonsA stitched panorama of the 2016 Oxford 250. The sounds of spring. Peepers, songbirds, revving engines.Producer Matt Roberts stopped by opening day at Oxford Plains Speedway in Oxford, Maine, recently and filed this audio postcard.