Encourage cleanliness in the metro system

The challenge

Encouraging the uptake of clean practices in the parisian metro system.

Our response

The workshop organised by BVA NUdge consulting led to two implement nudges :


Increasing the visibility of litter bins and ashtrays


Use emotion and reciprocity with photographs of RATP staff and thank-you texts

The results


The use of litter bins and ashtrays increased two-fold after the implementation of behavioural science solutions.


In addition, the perception of cleanliness improved, with 9 out of 10 users saying they were satisfied with the state of cleanliness.

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