In canton Basel-Country a voting campaign is having unintended consequences.
A row has erupted over plans to expand 30 kph main roads.
The motoring organisation, the TCS, wants a tougher approval process, proposing that residents vote at town meetings before municipalities can ask the canton to introduce lower speeds.
But the campaign itself is causing an unexpected slowdown, achieving exactly what the campaigners are against.
Posters featuring 30 kph signs are being picked up by some modern driver assistance systems, triggering automatic braking slowing traffic down.
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