Huum. I'm italian and no, does't work that way anymore. Maybe 20 years ago. Now aside from Autovelox for instant speed readings, they even have checkpoints and they average your speed. So yes, you can go superfast between two checkpoints but then you have to stop to lower your average speed before passing the next checkpoint. They call the system "Tutor". you can see the list of checkpoints here: http://www.autostrade.it/documents/10279/13188512/TUTOR_2016... and there are plenty of said checkpoints on the path took by the police car.