Several concerned motorists have called the City of Montreal's 311 hotline, worried about a sinkhole at the corner of St. Denis and Roy Streets that appears to be getting deeper daily.

The sinkhole is at the southeast corner of Roy and St. Denis streets. (Google Map)

A spokesman for Montreal's Plateau borough said the borough is aware of the problem. However, it's confident the road will not cave in, as the ground underneath the asphalt is shifting but is not hollow.

A Concordia University civil engineering professor is less certain.

"With continued heavy traffic everyday, I expect this could really sink more," said Adel Hanna, calling the two-foot deep depression a "potential sinkhole."