Which action is recommended to prevent accusations of impropriety during prisoner transport?

Recording mileage, times, and locations during prisoner transport is a recommended action to prevent accusations of impropriety. This practice provides a clear and documented account of the transport process, which can be essential in maintaining transparency and accountability. By logging these details, officers can provide verifiable information about the transport that may be crucial in addressing any allegations made against them later.

This method serves as a safeguard for officers, ensuring that there is an official record of the transport route and time frame, which can be referenced if any questions arise. Additionally, it can help corroborate the officer's account of the events during transport, serving to protect both the integrity of the officer and the rights of the prisoner.

Other options, while potentially useful in certain contexts (like maintaining vehicle safety or communicating with dispatch), do not directly contribute to the goal of detailed documentation that can serve as evidence against claims of misconduct.