The Unwritten Overtaking Code: A Detailed Look at Truckers’ Indicator Signals on SA Roads

After reading hundreds of comments on the video I posted yesterday, it’s clear there are many different interpretations of the indicator signals that truckers use to communicate with drivers behind them.

So, I’m writing this article to clarify the most widely accepted and safest way to interpret this informal signaling practice.

Given the rate of crashes caused by unsafe overtaking, it’s important that I clear up the confusion around truckers’ indicator signals for safe overtaking.

In southern Africa, truckers have long relied on a tried-and-tested signalling method to help keep roads safer and make overtaking more manageable on single-lane highways.

This informal practice involves the lead trucker using indicators to give the driver behind a heads-up on whether it’s safe to pass.

While it’s not written into the traffic code, truckers consider it a valuable way to improve road safety when used responsibly.

I will not focus on the other interpretations as they directly contravenes driving rules.

Here’s the most acceptable way and how it works: when a trucker in front flicks their right indicator, they’re generally warning that it isn’t safe to pass.

How It Works

1. Right Indicator – When a trucker in front flicks on their right indicator, they’re usually signaling that it’s not safe to overtake.

Legally, a right indicator shows the intention to turn right or pass another vehicle. So if you’re behind a truck on a single-lane carriageway, treat this as a sign to hold back.

The trucker may have spotted oncoming traffic or other risks up ahead, so don’t attempt to overtake.

2. Left Indicator – When the trucker activates their left indicator, it might mean it’s safe to pass on the right.

According to South African law, a left indicator signals the vehicle may be turning or pulling off to the left, but truckers often use this as a heads-up for following drivers that conditions might be suitable for passing.

However, this isn’t a green light.

Legally and for safety, you can only overtake if you’ve confirmed that the road ahead is clear.

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Caution Is Key

This indicator system has its roots in trucking culture, where drivers often have a limited view of what’s happening behind and in front, especially on twisting, narrow highways with limited visibility.

The key, however, is always to approach with caution, understanding that while the trucker may have a broader perspective of what lies ahead, the responsibility to overtake safely remains with you.

So, next time you’re stuck behind a truck on a long haul, keep an eye out for those indicator signals.

Truckers rely on this method to help keep traffic flowing smoothly – it’s an unwritten code that’s earned its place on South African roads, respected by those who understand the rhythms of the trucking world.