Financial incentives do not make sense: having a car in Paris is already crazy expensive.<p>During the 20 years I lived there, I cycled everywhere, and I had an almost weekly accident, always at the same three intersections -- cars running into stationary bikes, half the time openly on purpose (there is a bolo for a taxi driver for attempted manslaughter under my name: his plaque was unlegible on the camera, but him accelerating twice into my bike was clear).<p>The local police knows those intersections, there are camera monitoring those. Those are on large axis, and have the largest concentration of tourists (about 50 people waiting at the light at any time of the day).<p>If you want to make Paris a biking city, no need to spend millions; all the protected lanes become useless ever 50 m when an intersection shows up and dozens of car just want to run you over no matter what.<p>Just ask Police to enforce laws on attempting to kill people and make clear that a car can be used as a weapon. You do not even need to budget their presence: they are already there, watching and helpless.