What is the purpose of a neutral safety switch in a vehicle?

The neutral safety switch is a critical component in a vehicle's transmission system, serving to enhance safety during engine starting. Its primary purpose is to prevent the engine from starting unless the transmission is in either the neutral or park position. This design ensures that the vehicle does not inadvertently start while in gear, which could lead to unintentional movement and pose a risk to the driver, passengers, or bystanders.

When the transmission is in the correct positions (neutral or park), the neutral safety switch sends a signal that allows the electrical circuit to engage the ignition system, enabling the engine to start. By doing this, the neutral safety switch effectively helps to minimize the chances of accidentally starting a vehicle that is in a drive gear, thereby protecting both the driver and the vehicle.

The other options either relate to functions not performed by the neutral safety switch or describe features that are not its primary role.