Crews worked overnight to repair the pipeline, and the highway was reopened for the morning rush hour.
A Terasen Gas crew turns off a valve Monday night in order to stop an undergound gas leak on Lougheed Highway in north Burnaby.
Highway traffic could possibly be disrupted again later in the day to continue repairs, said Terasen Gas spokeswoman Joyce Wagenaar.
The leak was first discovered around 5 p.m. Monday, when the fire department started getting calls from people complaining of a strong odour of gas around the Lougheed Highway and Underhill area.
Terasen Gas shut down a number of valves to isolate the leaking pipeline and police went door to door, telling 500 people to leave their homes.
Crews eventually determined the leak was coming from a crack in a pipeline and residents were allowed to return to their homes around 8 p.m. after the gas was shut off.