Field Of Vision

In the context of vehicles, the term ‘field of vision’ refers to the total area that a driver can see while operating the vehicle. It encompasses everything visible to the driver from the driver’s seat, including the road ahead, side mirrors, rear-view mirrors, and blind spots.

Several factors contribute to the field of vision in vehicles:

  • Windshield:

The windshield provides a forward field of vision, allowing the driver to see the road ahead. It is essential for the windshield to be free from obstructions, such as cracks or dirt, to ensure a clear view.

  • Rear-view and Side Mirrors:

These mirrors extend the driver’s field of vision to the rear and sides of the vehicle. Properly adjusted mirrors help minimize blind spots and improve overall awareness.

  • Blind Spots:

Blind spots are areas around the vehicle that are not directly visible to the driver, even with the use of mirrors. Checking blind spots by turning the head and using mirrors is crucial before changing lanes or making maneuvers.

  • Vehicle Design:

The design of the vehicle, including the size and placement of windows and pillars, can affect the driver’s field of vision. Some vehicles may have larger windows and thinner pillars to enhance visibility.

  • Technology:

Advanced safety features, such as reversing cameras, lane departure warning systems, and parking sensors, can supplement the driver’s field of vision and enhance overall safety.

An example of technology in use. On the right the driver has more visibility behind the vehicle, due to the rear mounted camera on the trailer (HSG144)

A well-designed field of vision in a vehicle contributes to:

  • Driver confidence
  • Reduces the likelihood of accidents
  • Improves overall road safety

Drivers should always be aware of their surroundings and use their mirrors effectively to maintain a clear view of the road and other vehicles.

A clear and expansive field of vision is crucial for safe driving, as it allows the driver to be aware of the surrounding environment and potential hazards. Traffic Marshals should speak to drivers to establish their field of vision, and any blind spots before undertaking a manoeuvre.

Mirror Field Of Vision

The yellow colour in the picture below is the mirror field of vision for an articulated vehicle. The red stars indicate where the driver can’t see, and the green stars where they can.

The image below shows how the mirror field of vision can change substantially when the vehicle is driving in a straight line, in comparison to the manoeuvre shown above.