Getting around the city is likely to take some getting used to; public transit here is on the whole quite good, extremely cheap, and covers most conceivable corners of the city, whether by bus or subway. Don't be afraid to ask someone for help if you're confused. You'll no doubt find the need for a taxi from time to time, especially if you feel uncomfortable in an area at night; you shouldn't ever have trouble tracking one down - the ubiquitous yellow cabs are always on the prowl for passengers
The subway
The New York subway is intimidating and initially incomprehensible. It's also the fastest and most efficient way to get from A to B in Manhattan and the outer boroughs, and it is safer and more user-friendly than it once was.
Buses
The bus system is simpler than the subway, and you can see where you're going and hop off at anything interesting. It also features many more crosstown routes. The major disadvantage is that they can be extremely slow - in peak hours
Taxis
Taxis are always worth considering, especially if you're in a hurry or in a group or late at night. Always use medallion cabs, immediately recognizable by their yellow paintwork and medallion up top; gypsy cabs, unlicensed, uninsured operators
Walking
Few cities equal New York for street-level stimulation. Getting around on foot is often the most exciting - and tiring - method of exploring. Figure fifteen minutes to walk ten north-south blocks - rather more at rush hour.
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