Making your car’s safety features work for you

Driving in a heavy downpour is rarely a relaxing experience. One minute you’re cruising along a dry motorway, and the next, the heavens open, visibility drops to near-zero, and the road surface turns into a slick, unpredictable hazard. If you’ve ever planned a road trip abroad or considered using a car hire in Southern Africa, you’ll know that you need to be prepared for all kinds of weather.

Whether you are navigating unpredictable coastal downpours in a rugged 4×4 hire in Southern Africa or just handling a damp evening commute back to your lodge, understanding how your vehicle responds to wet weather is an essential skill.

Thankfully, modern cars are packed with electronic driver aids designed to keep us safe when the weather becomes a challenge. But booking a 4×4 hire or driving a high-tech hatchback is only half of the equation; you also need to know exactly how these systems operate when things get slippery.

Here is our practical guide to making your car’s safety tech work for you when driving in stormy weather.

1. ABS, ESC, and TCS: The traction trifecta

When the road surface becomes slick, your tyres have to work twice as hard to keep you safely on the road. Three key chassis-control systems step in to prevent a slip from turning into a slide.

Anti-lock Braking System (ABS)

In emergency stopping situations on wet roads, your wheels can easily lock up, causing the car to skid uncontrollably. ABS prevents this by rapidly pulsing the brakes, allowing you to maintain steering control under heavy braking. If you’re driving a modern vehicle, you don’t need to pump the pedal yourself; you can simply apply firm, steady pressure and let the system do the hard work.

Electronic Stability Control (ESC)

ESC is particularly vital in larger vehicles and SUVs, as it detects when the car is beginning to deviate from your steered path. By selectively applying the brakes to individual wheels, it helps steer the car back into line. To let ESC do its job effectively, avoid sudden, jerky steering inputs, and keep your movements smooth and progressive.

Traction Control System (TCS)

When you need to pull away from a standstill on a wet junction, TCS prevents the driven wheels from spinning unnecessarily. It works by gently reducing engine power or applying the brakes on the slipping wheel. If you find yourself having to pull away on a wet incline, just apply the throttle gently and let the TCS manage the power delivery to find the right grip.

2. Advanced driver assistance and maintaining a clear view

Beyond keeping your tyres on the tarmac, modern car tech is designed to help you see and be seen when visibility drops.

• Adaptive headlights: Heavy rain drastically reduces your visibility when driving. If your vehicle is equipped with adaptive headlights, they will actively pivot with your steering to light up bends before you reach them. Always ensure your dipped headlights are manually switched on during heavy rain. Do not rely solely on automatic daytime running lights (DRLs), as these often leave your rear taillights unlit.
• Rain-sensing wipers: These systems use optical sensors near the rearview mirror to detect moisture on the windscreen, then automatically adjust the wiper speed to match the rainfall. A buildup of road grime can confuse the sensor, leading to erratic wiper behaviour. To prevent that, the system also ensures that your windscreen is regularly cleaned to keep the wipers running smoothly.
• Advanced Driver Assistance Systems (ADAS): Features like lane departure warning and blind-spot monitoring are incredibly useful in poor visibility. However, heavy rain or road spray can sometimes temporarily block the radar sensors or cameras. If the system warns you of a sensor obstruction, use your mirrors and physically observe your surroundings.

Quick Checklist for Driving in Heavy Rain:

• Reduce your speed: Dropping your speed gives you more time to react to unexpected hazards.
• Double your distance: Wet tarmac can double your stopping distance, so leave a generous gap to the vehicle ahead.
• Avoid standing water: Keep an eye out for deep puddles to reduce the risk of aquaplaning (where your tyres lose contact with the road entirely).

Ultimately, the safety features packed into modern vehicles are brilliant tools, but they are designed to assist the driver, not replace them. Electronic aids cannot override the physical laws of gravity and friction.

By understanding how these systems operate and driving at the right speed for the conditions, you can ensure that you and your passengers reach your destination safely, no matter what the weather throws at you. Most importantly, keep your car well-maintained, monitor your tyre tread depths regularly, and always drive with an extra layer of caution when the storms roll in.