Although the hype surrounding Pokemon Go has long ago died down, developer Niantic has still been hard at work keeping the app regularly updated. Some of the updates have been small, but others have introduced features that fans have been asking for since the game’s initial launch. This one is a bit different. Some won’t like it
In the newest update, Niantic is making the app as safe and fair as possible for everyone.
After you update the app to the newest version, you’ll no longer be able to play while traveling in a car. When the app detects that you’re traveling at 30 miles per hour or greater, Pokemon will no longer spawn in your area. Also, distance that counts towards eggs and your Buddy Pokemon will continue to no longer progress either. So if you have been trying to catch Pokemon while either driving or in the car with someone else, that is over now. You really shouldn’t be playing while driving anyway. This will give everyone an equal footing.
Prior to this update, a warning message would appear if the app detected you were moving too fast, but you had the option to say that you weren’t driving. Not anymore. Better to be safe.
Source Phone Arena