A post on Thai Visa Chiang Mai forum:
"I live in Lamphun 3 klicks from Big C
A large truck was travelling south from Chiang Mai on highway 11 at 6.30pm on Sat 13th Feb, it ran through a set of red lights 4 kiicks before the Big C junction, in so doing it crashed into a number of motorbikes turning onto the highway 11 on green lights, 4 people were killed.
The driver who lives 500 metres from me tried to escape the scene, but was chased by police.
The junction at Big C has an overpass to avoid local traffic mostly motorbikes coming & going to work on the nearby industrial estates, these people use the old road under the overpass.
The driver of the truck veered off highway 11 and took the slip road leading to the busy junction underneath the overpass, the road was very busy with workers returning home, the truck driver again went against the red lights and ploughed into the motorbikes crossing the road on green lights, a further 12 people died, two of those was in a Vigo truck which then brought the runaway to a holt.
The police caught the driver, and according to local opinion he was pretty badly beaten up by them.
A further 3 people have died in hospital making the carnage 19"
I cannot find any reference to this horrific event in any English language papers, but presumably it's true?
Very sad - my condolences to all victims & families.