From the Fietsberaad come these two films showing how cycling rates can affect traffic, using an area of Alkmaar as an example.
The two videos show possible futures for drivers in the city. The left hand side of each shows what the situation would be by 2020 if there was ten percent less cycle usage than at present while the right hand side shows the situation if there is ten percent more cycle usage compared with the present.
Investing in cycling infrastructure which encourages a higher cycling rate not only benefits cyclists but also drivers and society as a whole.
What's more, it is easier to address problems for drivers by improving conditions for cyclists as even the best quality of cycle provision is less expensive and more compact than building roads.
Once again, it can be seen that promoting cycling is good not only for environmental and health reasons, but also for fiscal reasons.
The Fietsberaad have produced a (long) publication in Dutch which goes into more detail. This includes the observation that subjective safety is improved by an increase in cycling vs. driving. Half of all car journeys in the Netherlands are under 7.5 km (therefore easy to target as cycling journeys). Many larger cities in The Netherlands have successfully increased cycle use quite sharply in recent years. e.g. Groningen by 10% over 3 years, Amsterdam by 36% over 16 years and Den Haag by 11% over 3 years. It is also expected that the change to taxing motorists per km driven will result in an increase in cycling in the Randstad area of about the same amount.