Off-Road Discovery Off-Road Discovery

On-Road Rollovers

Reduce the Likelihood of a Vehicle Rollover


What Can You Do to Reduce the Likelihood of a Rollover?

On-Road Rollovers: Straight Roads

Usually, On-Road Rollovers on Black Top Tarmac or Gravel Roads are caused by lack of concentration or a distraction when driving long straight roads and too much speed when driving corners.

Losing a wheel off the edge of the road surface onto a softer surface can create a braking effect as the front wheel digs in as mentioned earlier if the driver contras and turns back to the road surface.

If you lose a wheel off the edge of the road surface DON’T TURN BACK!

Assuming you are not endangering the vehicle and life, DON’T BRAKE!

Take your foot off the accelerator which reduces the speed, steer in a straight line to maintain stability and allow the vehicle to slow naturally although, IF in a straight line you can GENTLY start to apply the brakes until the situation is recovered. Now relax, check the vehicle for damage before continuing your journey.

On-Road Rollovers: Corners

Rollovers occur more regularly on corners than other situations. This is because the vehicle dynamics are already under stress. Add speed and road surface conditions and it is easy to de-stabilize things.

Over-Steer on Corners:

Over-Steer occurs when you have too much speed for the road conditions and perhaps turn into the corner too quickly. When you do this, the rear tyres lose traction and the vehicle slides out with a combination of weight transfer and centrifugal force and tries to overtake the front. The natural driver reaction is to contra this but self preservation also usually leads to braking. Braking causes more weight transfer forwards, the rear becomes lighter and the the driver is likely to lose directional control so the vehicle leaves the road. As this happens, the wheels with most weight on them dig into the softer verges and weight transfer creates the rollover situation.

Reduce chance of on-road rollover

Under-Steer on Corners:

Under-steer occurs usually due to the driver turning into the apex of the corner too sharply when going too fast. Although the steering wheels are turned, due to the acceleration/speed, weight is being transferred to the rear wheels so the front tyres lose adhesion. When this happens, momentum carries the vehicle onwards in a straight line.

What follows normally is that the vehicle leaves the road surface and because the front wheels are already turned to take the corner, as soon as they land on a softer surface they dig in. More weight transfer occurs causing a braking effect with the resultant rollover.

Reduce your chance of an on-road rollover, read further tips

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This content was prepared for the Off-Road Discovery Website by Xplorability 4wd Training

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