If you're in Kenya, you've probably witnessed an empty plastic water bottle strategically tied to the wheels of long-distance trucks.
While this may look random, there is actually a science behind it.
As it turns out, truck drivers, particularly those operating in Kenya and the East African region, tend to lift or suspend some of the trailer axles - a practice that goes a long way in saving fuel since it reduces rolling resistance because fewer wheels are in contact with the road.
Further, some trailers can have up to six axles, whilst not all of them are needed to transport goods, prompting drivers to lift them, which helps them manoeuvre the long vehicles easily.
