What to do about highway traffic? More roads or public transport?
In a new study by two Canadian economists, the answer is neither nor. However, the authors come up with another proposal:
The Fundamental Law of Road Congestion: Evidence from US Cities
These findings suggest that both road capacity expansions and extensions to public transit are not appropriate policies with which to combat traffic congestion. This leaves congestion pricing as the main candidate tool to curb traffic congestion.
Swiss Economist 