China is embracing light rail in a big way. Check out this report here.
Step forward light rail systems, the construction costs of which are 20-30% of a metro, with a similar wave of construction and development now underway across China.
At the end of 2014, eight Chinese cities operated light rail networks, with a cumulative distance of 192.6km, and several cities are on course to open their first lines in 2015. Plans are now in place to develop more than 2000km of lines by 2020 and up to 4000km of lines by 2050. But with 319km of light rail infrastructure currently under construction, and 1835km already in the design phase, this number is likely to be out of date very soon.
It is important to realise that modern trams may be built at street level, but they can also have dedicated lanes and be elevated over difficult or congested stretches. This is what the original transport masterplan consultants Halcrow (to whom the Penang state government paid over RM3m) recommended for the 17.4km route from the Penang airport to Weld Quay route – dedicated lane at street-level, elevated along certain stretches and then shared roads when entering George Town. The cost RM40-80m/km – or just over RM1bn.