Stock photo.

An Ancaster resident is facing charges after being caught sleeping behind the wheel on Walpole Island.

Lambton OPP officers found the vehicle parked at a Tecumseh Road business Sunday morning.

Authorities woke up the driver, but suspected they had been drinking.

The 45-year-old was arrested and taken to the OPP detachment for tests.

The accused has been charged with impaired driving and driving while prohibited under the Criminal Code.