Two separate truck rollovers overnight caused major delays for Toronto commuters on Thursday morning.

A truck laden with plastic tubes overturned on the southbound ramp from Highway 427 to Highway 401 at around 4 a.m. Police closed the northbound and southbound Highway 427 ramps to the westbound Highway 401 for a number of hours.

That stretch of highway re-opened shortly before noon.

Meanwhile in the east end, a truck overturned on the Highway 404 southbound ramp to the eastbound Highway 401 at around 3 a.m. The incident snarled traffic for more than five hours before police opened the lanes shortly after 8 am.

Police said speed is to blame for both accidents.