A two-inch long nail sticking out of the road on Tsing Kwai Highway left 13 vehicles with flat tires and caused a massive traffic jam.
The nail was about the size of a dollar in diameter and was covered by a construction helmet, Apple Daily reports.
The incident caused serious traffic congestion on Tsing Kwai Highway, leading to a collision between three vehicles — a tour bus, a small truck and a taxi.
The taxi driver and a female passenger were sent to Princess Margaret Hospital. Their condition is unknown.
A spokesperson for TIML MOM Ltd., which operates traffic control in the Tsing Ma area, said seven vehicles had their tires busted.
These included two private cars, two heavy good vehicles, one single decker bus, a double decker bus and a van.
He said no abnormalities were found during last week’s inspection of the highway. A half-yearly check was carried out a month ago.
The nail has been cut and filed and the area covered, he said.
A similar incident happened on Tuen Mun Highway near Yau Kom Tau in November 2013 when a five-centimeter nail sticking out of the road surface caused flat tires on dozens of vehicles, crippling traffic.
Registered engineer Greg Wong said the incidents were purely coincidental and no one should be held responsible, Ming Pao Daily reports.
Wong said it is impossible to prevent accidents between regular highway maintenance checks.
Engineers assess road conditions according to the frequency of accidents and how often the checks are needed, he said.
He said these incidents have happened only twice in the past 10 years.
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