Written by : CATHERINE ROWELL

EACH DAY THE humble elevator , unsuspectingly to most , moves approximately one billion passengers worldwide , moving more people than cars , and has become one of the safest forms of transportation in the world . However , the global population is continually increasing , and with that is the average height of high rise buildings . Cities are growing vertically , where high-rise buildings have grown from 300 metres to 600 metres , which has bought several challenges for transportation systems and growing infrastructures , where governments are under considerable pressures to find solutions which are cost-effective and sustainable with low energy costs .

6 January 2017