Traction control can help in inclement weather.

What is traction control?

A traction control system (TCS) is a system that is designed to limit wheel slip during acceleration. TCS was first offered in a mass production vehicle in 1986. Since then it has tricked down into most vehicles on the market today.

How it works
While ABS reduces wheel slip during intense deceleration (heavy braking), this system uses many of the same components to minimize wheel spin and maximize the available grip during acceleration.

If wheel slip is detected, the sensor sends this information to the control unit that in turn reduces throttle input and/or applies the brakes to the spinning wheel(s).

Many systems only work until 25 mp/h. Other more expensive systems work at all speeds. Regardless of the system, it is most effective when the vehicle is already carrying momentum.

In other words, the system can sometimes become ineffective on very slippery surfaces where some slippage is needed to get the vehicle rolling (such as very slick ice). Some newer systems offer a mode that allows more wheel spin before engaging.

These new systems are so effective that more and more manufacturers are offering rear-wheel drive again. Rear wheel drive use to be considered bad in the snow. However, with modern electronics RWD is gaining popularity.

Like ABS, in order for traction control to work most effectively the vehicle must be equipped with proper tires. No electronic system can create grip, it can only maximize what is available.