Waterloo Regional Police say they've seized a woman's vehicle and licence after investigators allege she was driving more than twice the speed limit with a two-year-old child in the back seat.

Police said a speed trap on Block Line Road near Homer Watson Boulevard registered the speed of her vehicle at 105 km/h in a 50 km/h zone on Sunday shortly before midnight.

Once officers pulled her over, they discovered the 2-year-old child inside the vehicle, according to police.

Police said the woman's license was seized at the side of the road, along with her vehicle and was charged with under Ontario's controversial stunt driving legislation.

If convicted, the woman faces a maximum fine of $10,000 and a maximum jail sentence of six months.