Because of the dramatic increasing of oil price and environmental concern, both locally and globally, over the past decade,
various policy measures to curb energy demand from fossil fuels as well as to mitigate local pollutants and GHG emissions from their utilization in the transport sector have been introduced and analyzed in various countries,
especially in emerging developing countries as China and India .
Among those proposed policy measures,
promoting to use alternative technologies for road transport is an approach that often proposed for energy demand reduction and emissions mitigation in short-term to medium-term plans.