If you're looking for return on investment, then cycle infrastructure is the way forwards. Each mile travelled by bike actually benefits society (less illness etc) whereas each mile travelled by car costs society.
> For every £1 invested, walking and cycling return an average of around £5-6
> A study of New York concluded that, in terms of health: “Investments in bike lanes are more cost-effective than the majority of preventive approaches used today.”
> For every £1 invested, walking and cycling return an average of around £5-6
> A study of New York concluded that, in terms of health: “Investments in bike lanes are more cost-effective than the majority of preventive approaches used today.”
From https://www.cyclinguk.org/briefing/case-cycling-economy