01/06/2026
The argument against bike lanes is usually about cost. The evidence increasingly says that argument has it backwards.
A report from the Institute for Transportation and Development Policy, supported by the FIA Foundation, found that networks of protected bicycle lanes can be remarkably cost-effective. In the cities it studied, these networks created more economic value each year than they cost to build, paying for themselves in under a year once you account for transport savings and the health benefits of more people exercising. On that measure they outperformed far more expensive projects, including metro rail.
The safety case is just as strong. One of the most comprehensive studies of road safety, led by researchers at the University of Colorado Denver, found that it was not the number of cyclists that made a city safer, but the infrastructure built for them. Separated, protected lanes were linked to fewer fatalities for all road users, not only those on bikes.
The type of lane matters enormously. Research from Canadian cities including Toronto and Vancouver found that physically separated cycle tracks were far safer than painted lanes, and far better at convincing hesitant people to ride in the first place. Paint on the road, it turns out, does relatively little. A kerb or a row of bollards does a great deal.
Put together, the picture is hard to argue with. Protected lanes save lives, cut emissions, ease congestion, and often return their cost within a year. For cities still treating them as a luxury or a nuisance, the data suggests they are one of the best value investments a transport budget can make.
