If you remove bike lanes you…

If you remove bike lanes you either force more people to drive, increasing the number of cars on the road and causing congestion, or you force cyclists and drivers into mixed traffic. As bikes are far slower than cars this will slow drivers down significantly. It will also lead to more accidents, which will both distract emergency vehicles from other emergencies and lead to them blocking traffic more frequently on their way to bike-car accidents.

Having recently spent several months in a large European city with good cycling infrastructure, one thing that impressed me was just how much more smoothly the car traffic could flow there compared to Canadian cities of the same size. By providing better options you reduce the amount of people who *need* to drive, and so those who genuinely require a motor vehicle benefit.