Road is not in line and suddenly get small curve ( reason unknown) . Then look like very sharp curve on expressway. What is road speed here?

This lady is driving down a stretch of road on St. Louis St. in Springfield, Missouri. She is driving exactly 30Mph and as she does so the rumble strips create the melody of “America The Beautiful”. This just opened up recently. The song was chosen as a tribute to America’s open road, the spirit of Route 66 and the upcoming celebration of the country’s 250th anniversary. ❤️🇺🇸I think that is too cool. Love when towns and cities are patriotic. 💯Never knew this existed or was a thing. I’ve heard