by Katie Zavadski
On Monday, in order to reduce smog, Paris tried ban half of its cars from driving that day. Emily Badger warns that these types of bans can backfire:
From an environmental standpoint, there are at least two ways to try to rein in pollution from vehicles: We can either improve the technology itself (getting cleaner, more efficient cars on the road), or we can try to reduce how much people use it. Unfortunately, evidence suggests that attempts at the second strategy often undercut the first one.
Research out of Beijing has found that the ongoing one-day-a-week ban has reduced particulate matter there by about nine percent. But a study out of Mexico City found no positive environmental benefits from the regular ban there, for a fascinating reason.
People really like to drive, and they’ll come up with some seriously inventive ways around restrictions. In Mexico City, it appears that many people bought cheap, used second cars (you’ve got your odd car and your even car) to get around the license plate rule. In effect, it appears as if the ban caused an increase in the total number of cars on Mexico City’s roads, tilting the makeup of the entire fleet toward less fuel-efficient vehicles.
Zachary Shan considers what Paris did wrong and right:
The positive move taken in Paris, in my opinion, is that the ban excluded electric cars, hybrids, and people who carpooled (3 or more people to a car). So, rather than being encouraged to buy more cars of lower quality, such a policy would encourage people to buy electric cars and hybrids. But the concern mentioned above still seems valid. So far, studies on such bans have reportedly come to mixed conclusions.
Is there a better solution? It seems there are a couple of solutions that have been shown to work better: low emission zones (LEZs) and congestion charges. They go about the matter in different ways, so can actually offer better results when combined.
The Dish 