Fuel use, tyre wear, insurance premiums, vehicle maintenance…
You may be used to paying for these things but that doesn’t make them an inevitable fact of life.
You can do something about it.
As soon as someone knows they are being watched, their behaviour changes.
Give them a target to shoot for and they’ll continually improve.
This translates to reduction in fuel use, tyre and brake pad wear and maintenance cost as well as improved vehicle life…