Need for Speed Rivals is the newest iteration of the popular EA racing franchise.  I had the opportunity to play the demo while at E3 on the PS4.  The NFSR demo area had three bays, with each bay comprising of three cops and three racers.  For you non math majors out there, including me, there were a total of nine racers and nine police officers.  The nine racers can go about their business competing in various races while the police officers can initiate a police chase at any time.  This is a pretty cool feature implemented into NFSR.