Police and emergency services responded to reports of a single-vehicle truck crash on Frankford Road, Harford about 3.30am this morning.

A 56-year-old man was transported to the Launceston General Hospital in a serious but stable condition.

Investigations into the crash are continuing and police would like to speak with anyone who was travelling in the area at the time of the crash.

Anyone with information or dashcam footage is asked to contact Devonport Police on 131 444 or Crime Stoppers Tasmania on 1800 333 000 or at crimestopperstas.com.au. Information can be provided anonymously.