Pacing Speed Enforcement

The police can follow a behind a vehicle and measure the speed with the police vehicle.

How Pacing Works

Police officers may use any form of measuring the speed of a motor vehicle including using the police vehicle.

The office can measure the speed of a moving vehicle by:

  • following the speeding vehicle using the police car
  • matching the speed of the police vehicle with the speeding vehicle
  • using the speedometer of the police vehicle to determine the speed of the offending vehicle
  • once the police officer has ascertained the speed of the vehicle the officer measures the speed over constant distance.

Speed Enforcement with Police Vehicle



Pacing in Court

In traffic court if the speed clocked is greatly excessive of the maximum allowed the court would probably convict the driver of speeding.

The court may convict the driver even in the absence of tests as to the accuracy of the speed measuring, but it might not if only small differences were involved.

This means that if the police officer gives evidence that over a measured distance his speedometer recorded steadily the speed alleged, this is prima facie (evidence that if undisputed would allow the court to enter a conviction) evidence.

Prima facie evidence is sufficient to establish the fact of speeding unless rebutted, that the defendant was driving at that speed.



In the absence of some evidence, elicited either on cross-examination or by defence witnesses, that would suggest that the police speedometer was inaccurate, this is enough to convict.

The police officer many be required to prove to the court that the speedometer of the police vehicle was accurate for pacing, and that the police officer may have rounded the speed off to the lowest amount.