Mr. Thomas Murphy:

Outside the mandatory checkpoints, we have also rolled out training for crime units - drug units and so on - which may stop a vehicle on suspicion of there being drugs in the car. The search may be negative but the teams have now been trained to test the driver as well.

More often than not, they are found to be over the limit or drug-positive. That has rolled out exponential learnings throughout the force as well. That is in addition to the mandatory checkpoints.