Boston: One of the oldest cities in the United States
of America (USA), Boston has various parts wired with acoustic
sensors to detect and pinpoint locations of gunshots. Known as the
'ShotSpotter', the system is designed to detect locations of
violence like gunshots in the city. With 222 such sensors around
the city, this system also aids in detecting biological
weapons.
Apart from crime, the city is also
equipped to track greenhouse emissions and also has a software to
predict the maintenance needed in sewer systems.

Dublin: The capital of Ireland, Dublin is working on
developing a technology that will help in easing the road
traffic.
Aided by IBM, the city's council has
created an online database that helps people to know the fastest
way to their destination. A real time database will also help
people in locating the exact position of buses and also direct them
to parking spaces.

London: This leading global city, which is considered
the world's most visited city, has a renowned smart transport
system. This system enables people to pay for travel on tubes,
trains and buses via a smart card.
A wall of iPads in the office of
city mayor gives constant updates about city's performance,
trending topics on Twitter, the pollution level, river level,
etc.

Amsterdam: The capital of Netherlands, Amsterdam wants to
develop tourist-friendly apps that will help the tourists in
locating the best places in the city to visit. Apps such as Bike
Like a Local helps tourists to cycle across the city; Appening
Amsterdam helps locate happening places in Amsterdam; and Drive
Carefully which gives alerts if one is driving near a
school

Songdo: This South Korean smart city, also known as a
ubiquitous city or U-city, has inter-linked information systems.
Due for its completion in 2015, Songdo will be home to 65,000
people and 300,000 workers. Every home will have a telepresence
system which will help users to control heating and
locks.
