A PLUS spokesman said the accident at 8.30 am caused all the lanes to be blocked by the tanker lorry and traffic was at a standstill for over one hour.
PLUS has opened a contraflow lane to ease the problem faced by motorists stuck in the traffic congestion.
![Traffic congestion stretching 12 kilometres occured near Menora Tunnel heading north, after a tanker lorry crashed at 256.5 km North-South Expressway (PLUS).](http://img.astroawani.com/2016-12/81481363112_freesize.jpg)
A Bernama check found that north bound motorists chose alternative routes, namely via Chemor and Sungai Siput before entering toll plaza at Kuala Kangsar.
![PLUS has opened a contraflow lane to ease the problem faced by motorists stuck in the traffic congestion.](http://img.astroawani.com/2016-12/51481363136_freesize.jpg)
The traffic situation was under control while the operation to remove the tanker lorry was being carried out. --BERNAMA