In what circumstances will a police officer stop a car for speeding and demand identification of the driver?

Finally, in People v. Grant (1990) 217 Cal.App.3d 1451, 266 Cal.Rptr. 587, a police officer stopped the car in which the defendant was a passenger, for speeding. The driver had no identification. The officer then asked the defendant for his identification. When the defendant likewise had none, the officer told both the driver and the defendant to get out and to stand by the patrol car. He asked the defendant if he could search the car for identification; the defendant agreed. The officer found drugs. (Id., at pp. 1455-1456, 266 Cal.Rptr. 587.)