Road closures planned throughout Ottawa Sunday morning

Many roads in downtown Ottawa and elsewhere will be closed Sunday morning for a cycling event to support oncology patients at the local children's hospital.

The closures and lane reductions will last from 6 a.m. to 1 p.m., according to the CN Cycle For CHEO's website. Some roads may open earlier or later, depending on when it's safe to do so.

The event includes a 15K, 35K and 70K cycle, all of which will kick off at LeBreton Flats and will be staggered throughout the morning. There will also be a 5K and 2K walk.

Road closures and lane reductions are expected throughout Ottawa Sunday morning. (CN Cycle For CHEO)

Here are some of the roads affected:

• The Kichi Zībī Mīkan Parkway will be closed in both directions from Booth Street to Island Park Drive from 6 a.m. to 1 p.m., and from Island Park Drive to Carling Avenue between 8 a.m. and 12 p.m.

• Booth Street is closed from Albert to Wellington streets between 8 a.m. and 1 p.m.

• Different sections of Wellington Street are closed from 8 a.m. to 1 p.m.

• The Portage Bridge is closed after 8 a.m. Only northbound STO bus routes will be accessible.

• Sections of Laurier Avenue — stretching to the Queen Elizabeth Driveway on-ramp and continuing a little further eastbound to Nicholas Street — will be off-limits until approximately 11 a.m.

• Bay Street will be closed, with only local traffic allowed between Laurier Avenue and Wellington Street.

• The Queen Elizabeth Driveway will close from Laurier Avenue to Preston Street, with Prince of Wales Drive northbound closed from Preston to Heron Road.

• Heron will see a westbound lane reduction between Prince of Wales and Riverside drives, with eastbound closures in effect between Vincent Massey Park to Riverside. The park will be accessible to vehicles using Heron's westbound ramp.

• Riverside Drive will see a southbound lane reduction for a stretch.

• Hogs Back Road will see a partial westbound lane reduction, while Colonel By Drive will be closed in both directions from Daly Street to Hogs Back.

• Sussex Drive will be closed from Rideau Street to the Sir George-Étienne Cartier Parkway, starting at 9 a.m. The parkway will be closed until the early afternoon, with some local access available.