A driver is thought to have travelled for about seven kilometres on the wrong side of elevated highways before being stopped by tunnel staff. It was the second such incident in three days.
The man, who was stopped in the Cheung Tsing Tunnel in Tsing Yi, did not say how he initially got onto the eastbound section of the West Kowloon Highway travelling west. Police are looking into the possibility that he did so from Lin Cheung Road in Yau Ma Tei.
Police received at least three complaints from motorists who saw the Mitsubishi going the wrong way on the highway outside Olympian City in Tai Kok Tsui at about 5.15am.
The car then entered the Kowloon-bound tube of the tunnel, which was closed for maintenance.
'Shortly after entering the tunnel, it slowed down and then pulled over as staff from the tunnel signalled it to stop,' another officer said.
The man, 47, was arrested for failing to give a breath sample for a test. Police are investigating whether his driving was impaired by flu medicine that could cause drowsiness.