The crash happened at around 2.30pm when a Ford Fiesta turned on to King Street and collided with the back of a Honda Jazz before smashing into street furniture.
Police shut the road whilst ambulance crews attended and the driver of the Fiesta, a man in his 80s from Blackburn, was taken to hospital.
He remains in a serious condition, said police.
The crash happened at about 2.30pm yesterday (Wednesday, April 27) when a Ford Fiesta turned on to King Street and collided with the back of a Honda Jazz
The driver of the Honda was uninjured.
Anyone who witnessed the collision or has CCTV or dashcam footage should contact police on 101 quoting log 0767 of April 27.