High levels of particulate matter scaling less than 10 micrometers in diameter (PM10) in many urban areas have led to the introduction of binding PM10 limit values by the European Commission in 2005. Road transport in inner city areas is believed to be one of the main contributors to accumulated...

Economically efficient prices for the passenger transportation system in the Greater Cairo Metropolitan Area would account for broader societal costs of traffic congestion and accidents, and local and global pollution. A