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With good preparation and a bit of practice, anyone can off road and get to places other vehicles simply can’t

OFF ROAD TECHNIQUE

DRIVING IN SNOW AND ICE

When off-road driving on icy surfaces use the highest gear possible for the conditions

Driving on a Snowy Surface
4x4 OffRoad Terrain

Driving technique is especially important when driving in tough winter conditions – the natural capability of a 4×4 can be dramatically extended when it is used correctly.

To make the most of your 4×4 you need to understand how the system works to know how to get the most from it and the various traction control systems which are available on modern vehicles.

Inspection of the surface

As dangerous objects could be underneath the snow,walk on the surface to test it before driving through snow.

The maximum depth of snow you should drive through is up to the differential. If the surface consists mostly of new, dry snow, the maximum height could be up to the bumper. Anything deeper requires the vehicle to repeat the process of pushing the snow and then backing up.

The quality of the snow would change its resistance. Vehicles can get more easily stuck in wet and icy snow.

The vehicles get more stability by driving through a track left by previous vehicles.

Starting the vehicle

Abrupt clutching results in loss of traction. To start a vehicle, engage the clutch gently and gradually. Select a higher gear, too.With an automatic transmission vehicle, simply release the brake pedal to start the vehicle in motion.

Driving spead

On a road with an icy or snowy surface, drive at less than half the regular speed.

Steering operation

Overconfidence of driving a 4WD could lead to the vehicle getting stuck or to an accident. Once the vehicle loses traction, there is no difference between 4WD and 2WD.

Making a sharp turn is dangerous. If the vehicle starts to spin, it tends to spin towards the lower side of the road or towards the direction of the tire that slipped. Slowly, step on the accelerator pedal (don’t release the pedal) and counter-steer to regain control.

When the vehicle starts to lose traction during cornering, drivers tend to overcompensate. The driver should be aware of this tendency, as sometimes the vehicle regains traction suddenly and starts a sharp turn.

Brake

Test the braking for tire lock-up in a safe environment. Knowing this limit helps the driver make delicate maneuver under pressure situations.

Even vehicles with studless tires or those using tire chains have lower grip against horizontal momentum. Therefore, the vehicle speed should be lowered before cornering.

On the road, the areas before intersections and corners tend to have slippery surfaces, as many vehicles have applied brakes at those points before.

Up-Hill slope

Start the climb by observing the vehicles ahead and try not to stop while climbing. If you are forced to stop and can not restart,back up to the bottom of the slope and restart there.

Down-Hill slope

Shifting or sudden deceleration while going downhill should be avoided as the vehicle could lose traction.Choose a low gear and let the engine control the speed.

Off-road snow & ice driving Techniques

  • High / Low Range:
    Low for control, high for cruising
  • Gears:
    Pull away in a higher gear than normal for extra traction
  • Diff lock(s):
    Engage when slippery
  • Speed:
    Keep your speed down
  • Traction control systems:
    Keep on unless a hindrance
  • Note:
    Leave more room for braking, ensure all driver inputs are gentle

Pulling away

Ensure four wheel drive is engaged, and use low range gears (if fitted) when greater control is needed – this includes low speed manoeuvres or tricky undulating terrain. Pulling away in the highest practical gear will provide more natural traction due to the reduced torque being transmitted to the wheels. If you keep stalling when attempting to move off you’ve selected a gear which is too high. Ensure differential locks are engaged and electronic traction systems enabled to yield the best chances of pulling away successfully. There are occasions, especially when recovering a stuck vehicle, when disabling traction control systems can be beneficial, but it’s usually best to attempt recovery with the systems enabled first, only switching them off if you’ve been unsuccessful. The traction systems which can occasionally be a hindrance are the variety which have the ability to reduce engine power as a result of traction loss – occasionally you’ll need the ability to spin the wheels unhindered to provide maximum chances of recovery.

Making progress

Ok, so you’ve managed to pull away successfully and now you need to maintain progress.

Deep snow can hide hidden obstacles such as rocks, branches and frozen pools of water. Drive at a sensible pace, but keep momentum up where possible – plan as far ahead as you can to plot a route and prepare for unexpected hazards. If you’re driving on a well established track try to stick to the centre if possible to avoid drainage ditches.

Driving in rutted snow

If ruts have formed due to the action of previous vehicles, keep track of where your front wheels are pointing as steering feel can be dramatically reduced.
It’s very common for drivers to apply a certain amount of steering lock without noticing and the car will happily continue to follow the path of the ruts – this isn’t necessarily a problem unless the wheels do eventually find traction as this could cause the vehicle to jump suddenly out of the ruts and off the track.

Climbing hills

If you absolutely need to climb hill to reach your destination, read our hill climbing tips below and remember to use the highest gear possible to give you the best chances of success.
If you’re struggling to make progress you can try ‘steering for traction’ which involves rapidly turning the steering about a quarter of a turn left and right repeatedly – you’ll be surprised how effective this can be in really slippery conditions.

Controlling slides

Sliding on the flat

Slides usually occur for two reasons – driver input or terrain. Keep all driver inputs as smooth and progressive as possible to make the most of available traction.

If you do find yourself sliding while on the flat – you’ll probably be experiencing either understeer or oversteer.

Oversteer is related to understeer and occurs when the rear tyres reach the limit of adhesion in a corner before the front while cornering. This leads to ‘the back coming out’. If you manage to perform sustained, controlled oversteer this is know as drifting.

Understeer occurs when traction is lost at the front wheels while cornering, forcing you wide on a bend despite applying the correct steering angle. When viewed by an observer, this action looks as if the driver has applied insufficient steering lock (or under steered). If you’re car is understeering, you’re scrubbing off speed and missing the optimum line, so it’s not a quick way to take a bend.

Sliding downhill

If you’re driving on a slope and start to slide downhill you’ll need to react quickly to recover the situation. Avoid driving across a slope where possible – as a rule of thumb you should tackle these obstacles either straight up or down to gain maximum control. Use our article to learn the technique for descending slippery hills.
Remember that engine braking should be used to slow down the vehicle as a preference over braking, however in icy conditions even engine braking can cause a slide.

Sliding while slowing down

Always leave a serious amount of room to slow down, even if you have ABS fitted which will usually lengthen your stopping distance to maintain steering control – use this to your advantage to avoid hitting obstacles. Brake gently and progressively to reduce the chances of wheel lock, and remember that ABS is a reactive system so it’s best to avoid activating it at all if you can avoid it (because it means you’ve already caused at least one wheel to lock). If you don’t have ABS fitted, consider alternative braking techniques such as cadence braking.

Recovery when stuck

Even if you’re the best driver in the world, there will be times when nature will get the better of you and your progress hindered. The techniques below may help if you do find yourself stuck in the snow. Whatever method you choose, remember to select the highest practical gear, use the absolute minimum throttle and wiggle the steering for best results.

Clear snow from under the chassis

If you’re car is now sitting on a bed of compacted snow, it can be very difficult for the wheels to find grip – clear any snow away from the underside of the car and around the wheels with a shovel. Cutting channels for the wheels to follow can also aid progress.

Reverse out the way you’ve come

This may seem tediously obvious, but it’s often much easier to reverse out using the tracks that your own vehicle has created than forging new ones by attempting to continue. This should usually be your first course of action.

Rocking backwards and forwards

If you’re stuck in deep snow, sometimes a rhythmic rocking motion can be enough to free your vehicle – alternative between a suitable forwards gear and reverse, and attempt to start the car rocking forwards and backwards thus creating a small area of flattened snow which can be used to create sufficient run up to clear the obstacle.

Use traction aids

Sand ladders, snow chains, car mats and even cat litter can be helpful traction aids – use whatever you have at your disposal and put in front of the tyres in the desired direction of travel.

Reduce tyre pressure

Letting some air out of the tyres will increase the size of the contact patch and provide some valuable extra grip. Only use this as a last ditch attempt to get free, and if you need to get back onto the highway reduce your speed to the minimum practical speed and reinflate at the earliest opportunity.

Towing

If you’re well and truly in the deep stuff, towing is usually a much quicker and easier option than winching. Use tow ropes or straps which are suitably rated for the weight of the stranded vehicle and attach to approved recovery points. Drive the recovery car until the rope is tight, then stop. Then pull away gently while the driver of the stranded vehicle gently spins the wheels of the stuck car.