If you’ve traveled across Kenya, especially along highways used by long-distance transporters, you may have noticed something unusual—empty plastic water bottles tied to the wheels of huge trucks.
At first glance, it may seem odd or even like a careless habit, but there’s actually a practical and clever reason behind it, especially among truck drivers in Kenya and the East African region.
Many long-distance trucks have trailers with multiple axles—some have up to six. However, not all axles are needed all the time. When a truck is not fully loaded or when drivers want to save on fuel, they may lift one or more axles off the road.
This technique is used to reduce rolling resistance, meaning that fewer wheels touch the road, which results in lower fuel consumption.
It’s a fuel-saving tactic that experienced drivers use often, especially on long journeys across countries like Uganda, Rwanda, and the Democratic Republic of Congo (DRC).
But how do drivers keep track of which axles are lifted and which are still touching the ground? This is where the plastic bottles come in.
By tying an empty plastic bottle to the wheel nuts of a tyre, drivers can use their side mirrors to check if a particular wheel is spinning or not.
If the bottle is spinning while the truck is in motion, it shows that the wheel is on the ground.
If the bottle remains still, it means the axle is lifted. This simple trick helps drivers monitor the position of their axles without having to stop the truck or get out.
Although this method helps drivers navigate rough terrains and save on fuel, it comes with serious legal and safety concerns.
Lifting axles can lead to the truck carrying too much weight on the remaining wheels that are still touching the ground.
This unbalanced load can damage roads and even cause accidents. Authorities like the Kenya National Highways Authority (KeNHA) have warned against the practice, and it can attract heavy penalties if detected.
At weighbridges, for example, all axles must be on the ground to ensure the truck’s load is evenly distributed.
Drivers use the plastic bottle trick here too—making sure that each bottle is spinning as they approach the weighbridge, confirming that all axles are lowered and touching the road.
If any axle is still raised, the truck can be flagged for non-compliance.
Some drivers have shared stories of colleagues being fined up to Ksh400,000 for failing to lower their axles. In more serious cases, drivers can be arrested or even jailed. According to the East African Community Vehicle Load Control Regulations, fines for overloaded trucks can reach an eye-watering Ksh40 million.
Kenyan law also allows authorities to hold overloaded trucks for up to three days without filing charges.
After those three days, owners must pay Ksh6,450 (roughly 50 US dollars) for every additional day the truck remains detained.
Despite all these risks, the practice of lifting axles remains popular. Many drivers argue that it makes driving easier on rough roads and helps extend the life of their tyres.
In fact, newer truck models come with self-steering or tag axles that can be lifted automatically when the vehicle is not fully loaded. This has made axle-lifting even more widespread.
In conclusion, while it may seem like a random habit, the sight of plastic bottles tied to truck wheels is actually a clever technique used by drivers. It helps them monitor lifted axles for fuel efficiency, road navigation, and weighbridge compliance.
However, it’s a double-edged sword—what saves money on fuel can also lead to hefty fines and legal trouble if not done carefully.
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