e to work and to school. The result would be fewer cars in er traffic jams.

Solution:

The sentence describes the consequence of using public transport, which leads to fewer cars. The phrase 'encourage cycling' would also contribute to fewer cars. However, the provided text snippet is incomplete and does not allow for a definitive selection without more context. Assuming the sentence aims to connect public transport with alternative modes of transport, 'cycling' is a plausible option that contributes to fewer cars.

Answer: cycling