A 90-year-old man and 79-year-old woman were pronounced dead at the scene. The incident took place at the road’s junction with the B6070 and involved a Ford Fiesta and Honda Jazz.
Police have asked for witnesses to come forward with information as they try to assess the circumstances around the crash.
Sergeant Iain McIntyre said: “Our thoughts are with the families of the man and woman who died and our enquiries are ongoing to establish the full circumstances.
“We are asking anyone who witnessed the crash to get in touch.
“Anyone with dashcam footage that could assist with our investigation is also asked to contact us.”
Witnesses are asked to call 101 with any information.