Everyone knows the Van Wyck Expressway is a horror show — but this takes the cake.

A road-raging cabby took a frightened tourist and her son on a 10-minute terror ride on the Queens highway yesterday after picking them up at Kennedy Airport, cops said.

An officer on patrol spotted the hack as he tore through traffic chasing a limousine while Dong Ring, 52, of Redwood City, Calif., frantically waved for help, sources said.

The suspect, Ameen Ahmed, 43, picked up Ring, who was in town for a visit, and her son Tung Bui, 26, of the East Village, from the JetBlue terminal.

After speeding away, Ahmed got upset with a limo driver and began driving in a “reckless and unsafe manner,” a source said.

Port Authority Police Officer Brant Maynard, who was driving nearby, noticed Ahmed driving erratically.

A police source said that when Ring saw the officer, she began “waving her hands frantically,” hoping he would force him over.

“I’m glad you were behind us and pulled him over and locked him up,” Bui told Maynard.

Ahmed, of Richmond Hill, was charged with reckless endangerment.