No, it's entrapment. The pizza driver would probably still be busted for the speeding tickets but the cops could easily lose their jobs.
In fact, a case somewhat similar to this was just resolved in Tigard, OR. A senior officer had a grudge with a particular private citizen and told a rookie cop that he would give the rookie a free steak dinner if he busted that citizen for DUI. The rookie saw the citizen eating at a local restaurant/bar, waited for the citizen and arrested him for DUI. Unfortunately for the cops, the citizen had not been drinking, and despite every test coming back negative, they held him all night. The cops lost their jobs and the city had to pay out $125k.