Singapore's Kallang-Paya Lebar Expressway (KPE) has been ranked among the top international tunnels in a European Tunnel Assessment Programme.
The KPE was also given a top rating under the European Union's Directive on Safety Requirements for Road Tunnels in Europe in July.
The KPE was also given a top rating under the European Union's Directive on Safety Requirements for Road Tunnels in Europe in July.
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