LOL here basically it's not a pursuit.. the M5 are disguised as normal cars, but equipped with all sort of sensors needed to record your speed.. they follow fast cars of course in places were there are no fixed speed cameras, only highway obviously.. they follow you for a while (there is a minimu required to be able to fine you).. and then they put the light on the roof and make you stop
it happened to my grandpa LOL.. but that time it was a Saab 9000 not an M5...