New Traffic Calming Measures and Cycling Infrastructure in Bellevue, Nantes

Nantes Métropole has launched new traffic management trials in the village of Bellevue, introducing alternating traffic zones and separated lanes to improve safety and reduce vehicle speeds. These infrastructure changes, located along the promenade de Bellevue, the route des Sables, and the rue de la Loire, follow feedback from a study where local participants identified a critical need to secure shared spaces and curb automotive speeds.

Did You Know? The current modifications are the result of a formal study conducted on the banks of the Loire, where residents directly requested measures to prioritize safety in high-traffic zones.

Infrastructure changes to reduce speed

To address concerns regarding high vehicle speeds, Nantes Métropole has installed “écluses”—a system of alternating traffic flow—along the promenade de Bellevue and the route des Sables. This physical intervention is designed to force motorists to slow down by narrowing the available roadway at specific points.

New configurations for cyclists and pedestrians

The rue de la Loire has undergone a significant redesign to better accommodate cyclists, building on an initial testing phase that began in April. At the Porte d’Anjou roundabout, authorities have implemented a design that separates bicycle and pedestrian traffic from motor vehicles. Beyond this section, the route transitions into a “chaucidou”—a central lane for cyclists flanked by two lanes for cars—which continues toward the city center.

Expert Insight: The shift toward “chaucidou” configurations and separated lanes represents a strategic trade-off. By prioritizing the visibility and safety of non-motorized commuters, Nantes Métropole is attempting to balance the flow of through-traffic with the local demand for a more accessible, pedestrian-friendly village environment.

What happens next?

Nantes Métropole plans to conduct a formal evaluation of these traffic measures once the current experimental phase concludes. Officials will use the findings from this review to determine if the adjustments are effective. Depending on the outcome, the current installations could be modified or finalized as permanent fixtures in the village road network.

Frequently Asked Questions

Why did Nantes Métropole implement these changes?

The changes follow a study of the Loire riverbanks, where participants emphasized the need to reduce vehicle speeds and improve safety in areas shared by pedestrians, cyclists, and motorists.

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What is a “chaucidou”?

A chaucidou is a road configuration where a central lane is reserved for cyclists, while motorized vehicles use the sides of the road, moving into the center to pass one another only when the path is clear.

Are these traffic changes permanent?

Not yet. The current measures are part of an ongoing experiment. A final decision on permanent infrastructure will be made following an evaluation of the test phase, with adjustments expected if deemed necessary.

Do you believe that physical barriers like alternating traffic zones are more effective than signage for slowing down neighborhood traffic?