I tend to disagree but would be open to agreeing with better data. What about the cars that aren't purchased, upgraded or discarded? The land that isn't given

I tend to disagree but would be open to agreeing with better data. What about the cars that aren't purchased, upgraded or discarded? The land that isn't given over to parking? The waiting areas that aren't required at public transit stops? The dynamic pricing that encourages people to commute out of popular hours therefore smoothing traffic for everyone? This study is too simplistic to take at face value. PS. If it were easier to get halfway decent bikes around in most cities I would just cycle everywhere. The last bike shop I went in to in Sydney wanted AUD$3-10K (USD$3-7K) for a road bike: before extras.