The dictionary defines “avenue” as a wide street or main thoroughfare. It defines “street” as a public thoroughfare, usually paved, in a village, town, or city. So, the difference is that an avenue is likely to be wider and more of a main thoroughfare than a street.

http://dictionary.reference.com/browse/avenue

http://dictionary.reference.com/browse/street

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roads are the main roads thats why you dont hear people say the main lane or highway. streets come off roads and avenues and lanes and close come off streets. Avenues come off roads. Or i could explane it extra useful like this – street; stressful music for use of automobiles: an prolonged surfaced direction wide sufficient for automobiles to be pushed on it (many times used in placenames) highway; public street on the city: a public street, enormously in a city or city, many times coated with homes lane; narrow highway: a narrow direction, street or highway, many times in older city factors or interior the geographical area, many times enclosed via partitions or hedges highway; delivery extensive highway: a brilliant highway or street in a city Encarta ® worldwide English Dictionary © & (P) 1998-2004 Microsoft organisation. All rights reserved. think of of it this way, In a 50 sq. kilometer portion of suberbia, there would be like 6 roads,20 avenues, 1000 streets and approximately 4 hundred lanes.

I believe Avenue is French, and Street is Saxon.

I dont know if this is what you mean….

but I know where I live the streets run north to south…and avenues run east to west