I just found this on wikipedia saying that nfs prostreet the new upcomming nfs game will not have any cops or take place on streets but on actual tracks. These were the main reason I liked the need for speed series more than other racing games.
Need for Speed: ProStreet - Wikipedia, the free encyclopedia
"Need for Speed: ProStreet will take the Need for Speed series in a new direction. Instead of an arcade style of gameplay which has dominated the series, ProStreet will focus much more on realism and move closer to racing simulation, but still with the option to use driving assistants to make driving much easier. Unlike its predecessors, all racing in ProStreet will take place on closed tracks, thus making it the first game in the series not animating illegal racing behaviour, hence there will not be any cops in the game."
Need for Speed: ProStreet - Wikipedia, the free encyclopedia
"Need for Speed: ProStreet will take the Need for Speed series in a new direction. Instead of an arcade style of gameplay which has dominated the series, ProStreet will focus much more on realism and move closer to racing simulation, but still with the option to use driving assistants to make driving much easier. Unlike its predecessors, all racing in ProStreet will take place on closed tracks, thus making it the first game in the series not animating illegal racing behaviour, hence there will not be any cops in the game."