A small truck driver was caught driving under the influence of drugs in a busy Taiwan tunnel, a dangerous scare for other motorists that ended with an arrest.

• A white truck was swerving side to side along the northbound Xueshan Tunnel on Freeway 5 in Yilan County.
• Multiple drivers called police, saying the truck nearly caused several crashes and even drove into the emergency lane.
• Highway patrol guided the truck off at the Shiding exit, and a saliva test on the 57-year-old driver came back positive for drugs.
• The driver now faces charges of endangering public safety.

Outlook: The case has been handed to prosecutors, and the driver is likely to face criminal penalties for driving while impaired.