Management consultancy Mercer's ranking for the cities with the best infrastructure based on electricity supply, water availability, telephone and mail services, public transport provision, traffic congestion and the range of international flights from local airports.

Here are top ten cities with world's best infrastructure.

1.     Singapore

2.     Munich, Germany

3.     Copenhagen, Denmark

4.     Tsukuba, Japan

5.     Yokohama, Japan

6.     Dusseldorf, Germany

7.     Vancouver, Canada

8.     Frankfurt, Germany

9.     Hong Kong

        London,UK