Kilometers to Miles (km to mi) — Conversion & Practice

Anton is from Canada where the speedometers in cars are in kilometers. The speed limit on Canadian highways are usually $100 \text{ km/hr}$. When Anton crossed the border and entered the US, the speed limit of the highway reads $55 \text{ miles per hour}$. However, he was still driving at $100 \text{ km/hr}$. Is Anton going over the speed limit?