Podcast:99% Invisible Published On: Thu Apr 04 2013 Description: On the streets of early 20th Century America, nothing moved faster than 10 miles per hour. Responsible parents would tell their children, “Go outside, and play in the streets. All day.” And then the automobile happened. And then automobiles began … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.