The report "Smart Cities Market by Solution and Services for Focus Areas (Transportation - Rail & Road, Utilities - Energy, Water, & Gas, Buildings - Commercial & Residential, and Smart Citizen Services - Education, Healthcare, & Security) - Global Forecast to 2020", The smart cities market size is estimated to grow from USD 312.03 Billion in 2015 to USD 757.74 Billion by 2020, at an estimated CAGR of 19.4% from 2015 to 2020.

The driving factors for the growth of smart cities market are technological advancements in the field of IoT, cloud, sensors, & mobility; growing demographics & hyper-urbanization; government initiatives; growing energy consumption & requirement for optimization of energy usage during peak hours; increasing share of renewable energy and limitations in capacity expansion; and decrease in operational cost for smart building infrastructures in capacity expansion.

The building segment is expected to grow with the highest CAGR in the focus area segment

The building technology has significantly changed over time, and various disciplines such as building automation for facility and emergency response management, building energy optimization, parking management, and in-building communication systems, are now being widely adopted. Green building initiates have taken up a center stage across many countries, especially across the Europe, North America, and APAC region. Focus on reduction in energy consumption and concerns over proliferation of environmental wastes are major driving factors for green building initiatives. Transportation is another major growing focus area during the forecast period. Smart transportation solutions have been successfully deployed in some of the major metropolitan cities around the world, diminishing traffic congestion issues.

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The major vendors in the smart cities market include IBM, Cisco, Microsoft, Schneider Electric, Siemens, Oracle, Huawei, Ericsson, Toshiba, and Hitachi. SAP, ABB, General Electric, Silver Spring Networks, AGT, Itron, Alstom, Kapsch, Alcatel Lucent, Honeywell International, and Maven Systems are identified as key innovators in the market.