Have all phones use their GPS with an app that cannot be turned off that monitors your position. If it changes with a velocity greater than 2 mph the phone,text,wifi and mobile data are inop until you are below the velocity ie stationary. An inconvienence for those who use busses/trains but we did without cell phones for years and managed to survive.
Enforcement of these types of laws is like the war against drugs a no win.
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