Germany uses red dot traffic signs to bypass congestion

In Germany, a specific traffic sign featuring a red dot is used to guide drivers through the ‘red route’ system, an alternative traffic network designed to alleviate congestion, accidents, or road closures.

These routes are not permanently active but are activated strategically to divert traffic from heavily burdened main roads or motorways onto pre-planned bypasses. Once the bypass is completed, drivers are directed back onto the primary route. This system aims to reduce traffic jams and improve travel safety and efficiency.

A notable example of this system is located in Bavaria near the Pfaffenstein Tunnel by Regensburg, an area frequently subject to high traffic volumes. Because the red route is only used during specific peak times, roadworks, or emergencies, many drivers remain unaware of its meaning. When active, information regarding these diversions is typically communicated via radio traffic reports or navigation applications.