That would just be an insurance issue to sort out and your company would just hold the bad driving of the other bloke to account? A police car wouldnt have solved that problem. The police cars you see are going from call to call, and the rare traffic cars you will see are probably going to fatal accidents or some big event that will be affecting the infrastructure on road networks. Bumps due to twats who cant drive are for insurance companies, no?
I'm fairly certain they pull people over for dangerous driving and speeding.