He disclosed of the long closure of the bridge after joining the team of engineers from the Bangkok Metropolitan Administration to inspect the damage caused to the bridge by the fire this morning.
He said inspection of three steel structures of the bridge were deformed from the heat of the fire and were therefore unsafe for use.
The flooring of the bridge was also damaged, he said.
It was agreed that the bridge would now closed to repair for 45 days.
During the closure period, traffic at the intersection will be changed, he said, adding that the police will not allow vehicles to make right turn at the intersection, beginning this afternoon.
The next step will be the removal of the traffic island on Rama 4 road to make more traffic lanes for vehicles, he added.
The flyover closure is expected to worsen traffic on Rama 4 and surrounding areas during the rush hours after office hours this evening.