For the past two decades, the 73-year-old has made the 30km commute from his home in western Singapore to his marine engineering consultancy office in Johor Bahru two to three times a week. He established a presence in the city across the border so he could secure local contracts as a Malaysian company after expanding beyond the island republic.

“I can go over any time straightaway,” said Pui, who usually sets off for work at 6am and returns home in time for dinner. “About 30 minutes and we are there already. Actually, faster than going to Shenton Way!”

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When construction began on the Johor-Singapore Causeway in August 1919, it was the largest engineering project in Malaya, costing an estimated 17 million Straits dollars – roughly the equivalent of US$1.6 billion in modern money.

The design by Messrs Coode, Matthews, Fitzmaurice & Wilson stretched 1.06km from bank to bank and its width of 18.2 metres allowed for two metre-gauge railway tracks, a 7.9-metre roadway and space for the laying of a water pipeline.

➜ Read the full story in the South China Morning Post