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Institution
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Retrofit programs on buses and trucks the U.S.

In 1993, EPA published Retrofit/Rebuild requirements for 1993 and earlier model year urban buses whose engines are rebuilt or replaced after January 1, 1995. The program is limited to urban buses operating in metropolitan areas with 1980 populations of 750,000 or more.

Go to the BAQ 2004 website
Topics
In-use vehicles > Retrofit systems

Secretariat: The World Bank & Asian Development Bank