That sounds like a big mistake. I can understand like, 48 km/h per hour in highly populated areas, but going below US school speed limits is going to create lots of offenders (maybe that's the end game). I can ride faster that 30 km/h on my bike. I can continually do that with as little as a 5% decline from the horizontal axis.
When you tell her you use Arch and she still has her clothes on ( sh.itjust.works ) Englisch
Amsterdam: Speed limit will be 30 km/h on most roads from today ( www.amsterdam.nl ) Englisch