Vehicular traffic on Chennai-Tiruchi national highways was disrupted after a tanker lorry carrying LPG cylinders toppled on G.S.T. Road near Chengalpattu on Saturday. The driver of the lorry, which was going to a southern district from Gummidipoondi, lost control of the vehicle while negotiating a curve. The lorry crashed into a median and toppled. The police and Fire and Rescue Services personnel removed cylinders from the road.