“WHY drink and drive, when you can smoke and fly” reads a flippant slogan on t-shirts.

But jokes aside, Vancouver Police are notifying the public of potential traffic disruptions during Thursday’s 4/20 activities expected to take place at Sunset Beach and in the area of the Vancouver Art Gallery.

Starting Thursday morning, police are anticipating large crowds to gather at Sunset Beach for the annual 4/20 marijuana demonstration. Traffic will likely be disrupted on Beach Avenue between Burrard and Broughton streets for most of the day.

Police, Fire, City of Vancouver, Park Board and BC Ambulance Service staff will be on hand to monitor the event.

An additional gathering is expected in the area of the Vancouver Art Gallery, with potential traffic disruptions on Robson Street between Hornby and Howe Street.

“Public safety remains our top priority,” says Constable Jason Doucette. “We will continue to weigh the rights of individuals to have their voice heard, while working to minimize the impact that has on others.”

Officers will also be looking for drivers who are impaired by drugs or alcohol. Drivers can expect to see police drug recognition experts and officers equipped with alcohol screening devices on the roads throughout the day.