My guess is that a livery is horse drawn and the taxi cab is motorized?
Technically, they're the same; public transport that is privately
hired, which goes back to horse days. In New Yorkese, taxis are those
yellow cars and SUVS that you hail from the curb. Livery cars are
private taxis, usually town cars, that you call for and they come pick
you up. Taxis have meters and liveries don't; they work off a fixed
fee or a price haggled upon by driver and rider. Liveries are not
supposed to pick up hails from the street but they commonly do once
you get away from the business sections of the city.
a limo is a livery service, a contract car. as opposed to a taxi which just
cruises around getting riders.
I googled(tm).
I didn't find what you want here, but still interesting. It might be
there.
http://www.nyc.gov/html/tlc/html/home/home.shtml
This page explains the differences.
http://en.wikipedia.org/wiki/Taxicabs_of_New_York_City
Here.
http://en.wikipedia.org/wiki/Taxicabs_of_New_York_City#Medallion_taxicabs_and_livery_taxicabs
An inside look at the industry.
http://nymag.com/news/features/54678/
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Those are licensed by the Department of Consumer Affairs.
http://www.nyc.gov/html/dca/html/licenses/087.shtml
http://www.nyc.gov/html/dca/html/licenses/086.shtml
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