Enterprise Rent-A-Car has launched Driving the Right Behaviour, designed to help address grey fleet issues.

The pack includes a tool to measure areas of grey fleet such as costs and emission profiles, as well as best practice advice, a transport policy template and a Grey Fleet Toolkit.

These impacts are then compared back to the corresponding impact of using rental vehicles.

“There’s a widespread appetite to find ways of minimising the impact of the grey fleet.

"Until now though, there’s been no easy way of defining these impacts.

"Without that information, it’s incredibly difficult to drive any sort of change,” said Oz Choudhri, head of public sector at Enterprise Rent-A-Car.

“Our clients are now able to easily spot the point at which employees’ own vehicles no longer make sense.