Generic American Bus Generations

Early Bus Generations
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GEN 1. = 1900 (Daimler Omnibus)
GEN 2. = 1915 (Ford TT Bus)
GEN 3. = 1930 (Mack AL)

Bus Generations
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GEN 1. = 1945 (GMC Old-Look)
GEN 2. = 1960 (GMC New Look)
GEN 3. = 1975 (Orion I)
GEN 4. = 1990 (New Flyer D40)
GEN 5. = 2005 (New Flyer XD40)

Articulated Bus Generations
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GEN 1. = 1970 (MAN SG 220)
GEN 2. = 1990 (MCI TC60-102N)
GEN 3. = 2010 (NABI 60-BRT)

Coach Bus Generations
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GEN 1. = 1940 (ACF-Brill IC-41)
GEN 2. = 1960 (Scenicruiser)
GEN 3. = 1980 (MCI MC-9)
GEN 4. = 2000 (MCI D4500)
GEN 5. = 2015 (TransBus Enviro 500)