THESE ROAD SIGNS DETECT DRIVERS USING CELLPHONES
If you're driving in the U.K. it's not just police you have to worry about catching you on your cellphone-- smart road signs can catch you too.
These smart signs are being introduced in Norfolk county and use scanners to electronically detect the radio signals transmitted when mobile phones are connected to a call. Further down the road, the offending driver will see another sign with a flash symbol, showing a cellphone with a line through it.
The Telegraph reports the scanners are smart enough to differentiate between radio signals from cellphones and Bluetooth signals, so drivers using a hands-free Bluetooth connection to talk on their phones won't get a warning.
Still, some drivers might get through, as the signs cannot pick up data connections from drivers using internet services on their phone. Also, the signs won't record any footage, meaning no fines will be issued to drivers, though the data collected will be shared with police to arrange possible crackdowns in the future in areas with heavy cellphone use.