What is a virtual safety car?

In the event of a racing incident, the stewards will send out the safety carThe FIA runs the event and is responsible for the safety of the drivers, crew, marshals and spectators. To manage... to neutralise the race, providing a safer environment for the marshalsMarshals, dressed in their distinctive orange overalls, have a number of roles but the majority are positioned around the circuit... There's more... who need access to the track to clear it. 

For a minor incident, the stewards can deploy the Virtual Safety CarThe Virtual Safety Car (VSC) is a system to slow the cars down to a safe speed while the problem... There's more... which is communicated to the driverOK, so we all know what the driver is, right. I've always liked the description that F1 drivers are like... There's more... by a series of lights on the side of the track. The driver must reduce speed to the required deltaIn F1 delta is the difference between two lap times. A slower lap will show a positive delta and a... There's more..., usually around 30% slower than under race conditions. 

Once the incident is cleared the VSCThe VSC (Virtual Safety Car) is a system to slow the cars down to a safe speed while the problem... There's more... light is extinguished and racing resumes. The VSC has the benefit of being able to switch on and off without the fieldThe field is a reference to the full grid of cars, from pole to the backmarkers. Consider it in the... There's more... having to complete the lap as it would under a full safety car.