Cover image via Generated by SAYS
Some traffic jams happen even when there's no accident, roadworks, or lane closure
You're driving along a familiar stretch of highway when traffic suddenly slows to a crawl. There are no flashing lights, no broken-down vehicles, no obvious cause. Then, just as abruptly, the road clears again.
This puzzling experience is known as a phantom traffic jam, and it happens more often than we realise.
Phantom jams often happen due small driving decisions, which snowball into massive slowdowns
Image via Grok (Generated by SAYS)
It usually starts when one driver brakes suddenly. Maybe they were distracted. Or maybe they were following the car in front too closely. When that happens, the driver behind has to brake too, often even harder. Then the next car does the same.
This creates a ripple effect. One small mistake turns into a wave of braking that spreads backward through traffic. Before long, cars further back are forced to stop, even though nothing is actually blocking the road.
In Malaysia, the problem gets worse because of how we drive
Tailgating, cutting lanes, and braking without warning all make phantom jams more likely. And during rush hour, it only takes one mistake to slow everyone down.
Interestingly, a study in Japan showed that even on an empty highway, minor inconsistencies in speed can eventually cause a jam. Humans just aren't wired to maintain perfect, steady speeds without overcorrecting.
Image via Grok (Generated by SAYS)
The good news is, we can actually help prevent these 'no reason' jams
Simple driving habits can make a big difference:
- Keep a safe distance from the car in front
- Drive smoothly, avoiding harsh braking or sudden acceleration
- Stay alert and minimise unnecessary lane changes
- Use indicators properly to give others time to react
