Need for geophysics studies to identify underground cavities

LETTERS: Sinkhole is one of the natural disasters that may be caused by natural or human activities in limestone areas. Kuala Lumpur, which is underlain by limestone formation, is undergoing rapid and extensive urbanisation and development.
The problem with limestone is its solubility and decomposition when it reacts with rainwater. Vibration and disturbance due to nearby construction work may also trigger sinkholes. There have been many incidents of sinkholes in Kuala Lumpur, especially after heavy rain.
In November 2019, a sinkhole opened up in Jalan Maharajalela when an underground pipe burst. A car fell 3m into the gap. A day after, another sinkhole appeared in Jalan Pinang, causing a massive traffic crawl.
Another sinkhole cropped up in Jalan Dewan Bahasa dan Pustaka, about 700m from the sinkhole in Jalan Maharajalela, just within 48 hours. A sinkhole at the Jalan Imbi-Jalan Pudu intersection happened along the same stretch in 2014.