Your argument seems to center around you conflating various traffic calming measures. If you look at the pictures in the article you will see that they are depi

Your argument seems to center around you conflating various traffic calming measures. If you look at the pictures in the article you will see that they are depicting a speed table, not a speed bump. Speed tables are longer and gentler than a speed bump, and designed to slow the vehicles down less than a speed bump or speed hump. I agree that 35mph is a bit high for most speed tables, but 30mph would not be out of place for such a device. Obviously hitting a speed bump at 35mph would be a very bad experience, but that's a different device than what's represented in the article.