Do you mean people or cars when you do traffic stop? If cars, then hold your horn, it will make them find a new pullover location, but that rarely helps. Traffic policer has built in mimic and follow commands. Press Left Control + Q to mimic the car infront of you, they will do the exact same movements you do in your car, and position them over. Or you can press Left Control + T to make them follow you, so you must be infont of them. There's also the new custom pullover which is with Left Control + W, you get a red circle that you position somewhere and the suspect will drive there. However, the suspect won't turn their car, they just go straight there and run over things. I adivse you to use mimic, that's the best. As for people, just push them out of the road by walking into them.