Monetary valuation of ecosystem services enables more accurate accounting of the environmental costs and benefits of policies, but this has rarely been applied in developing countries. In such contexts, there are particular methodological and epistemological challenges that require novel...

Common sense suggests that, at any point on a road network, there is an absolute limit to the volume of traffic which can be carried. But previous attempts to measure this "limiting capacity" have met with difficulties. First, there may not be enough vehicles to saturate the section of road...