Mystery of fires on road dividers along PIE in 2019 solved

Cause is ignition of mulch used for vegetation, multi-agency team finds, after two-year study

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A mysterious surge in the number of fires along a stretch of the Pan-Island Expressway (PIE) in 2019 had puzzled the authorities, who spent two years getting to the literal root of the problem.

Of 213 road divider vegetation fires that year, 51 per cent were along the 6.5km stretch between the Eng Neo Avenue and Central Expressway exits of the PIE.

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A version of this article appeared in the print edition of The Sunday Times on May 15, 2022, with the headline Mystery of fires on road dividers along PIE in 2019 solved. Subscribe