List of Ontario expressways
- Highway 400: Jane Street, Toronto – Highway 559 in McDougall (Highway 69 continues northward)
- Highway 401: Windsor – Quebec border near Curry Hill
- Highway 402: U.S. border border at Sarnia – Highway 401 in London
- Highway 403: Woodstock – Mississauga
- Highway 404: Toronto – Newmarket
- Highway 405: QEW north of Niagara Falls – U.S. border at Queenston
- Highway 406: E Main St. (Niagara Road 27) in Thorold – QEW in St. Catharines, a Super-2 with at-grade intersections between Port Robinson Rd. and E Main St. (Niagara Road 27)
- Highway 407: Burlington – Pickering (privately owned)
- Highway 409: Toronto Pearson International Airport – Highway 401 in Toronto
- Highway 410: Mississauga – Highway 10 at Valleywood in Caledon
- Highway 416: Highway 401 in Johnstown – Highway 417 in Ottawa
- Highway 417: Ottawa Road 29 in Arnprior – Quebec border near Pointe-Fortune
- Highway 420: Montrose Road – Stanley Avenue in Niagara Falls
- Highway 427: Evans Avenue near QEW in Toronto – Vaughan
- Queen Elizabeth Way: U.S. border at Fort Erie (Peace Bridge) – Highway 427 in Toronto; the designations 451 and 1 are sometimes used internally by the MTO
Other provincial freeways
The province also maintains freeways which are up to 400-series standards, yet are not numbered as part of the 400-series network. This is despite some of those freeways exceeding existing 400-series highways in size and traffic volume and despite some of them being connected to the 400-series network. Nonetheless, Ontario freeways do not receive a 400-series number unless they are designed to be complete controlled-access freeways for their whole length. The non 400-series routes listed below have significant open-access portions besides the freeway section, with the freeway segment typically being a small section not at the route's termini.
- The Conestoga Parkway - Baden to St. Jacobs through Kitchener/Waterloo. It carries the designations Highway 7, Highway 8, and Highway 85. Highway 85's southern terminus is at the part where Highway 7 turns off of the freeway portion. Its northern terminus is at Waterloo Regional Road 15 (King Street North), whence it continues as Arthur Street, or Regional Road 85.
- Highway 6 is a freeway in 2 segments:
- Highway 403 to Clappison's Corners at Highway 5. This freeway is a newly completed, 2.5 km stretch north of Hamilton. Plans are to eventually continue this freeway north to Highway 401 at Guelph.
- College Avenue to Paisley Rd. in Guelph, as part of the Hanlon Parkway. The rest of the Hanlon is an expressway with at-grade intersections. Plans are to eventually turn the entire length of the Hanlon into a freeway.
- Highway 7 is a freeway in 3 segments, and a fourth segment is in planning:
- Baden to Waterloo (see Conestoga Parkway above);
- Concurrent with Highway 115 from the interchange with Highway 7A to Television Road in Peterborough, bypassing the city;
- Carleton Place to Highway 417 in Ottawa;
- Plans are to upgrade Highway 7 from the Conestoga Parkway eastward to Hanlon Parkway into a freeway, along with the Hanlon.
- Highway 8 - Highway 401 to the Conestoga Parkway in Kitchener. The freeway portion of Highway 8 in Kitchener is known as the "Freeport Diversion" or the "King Street Bypass" or, by many area residents, as "the Highway 8 Expressway". In 1987, the Freeport Diversion was extended to Highway 401; this extension carried the unsigned designation of Highway 7187 until 2011 when it was designated part of Highway 8. Before 1987, traffic continued on King Street East, an undivided 4-lane arterial road to an interchange with Highway 401. Highway 8 is also a freeway co-signed with Highway 7 on the Conestoga Parkway from King Street to Baden.
- Highway 11 is a freeway in several segments. (Many of the non-freeway segments from Highway 400 to Sudbury are expressways, with a speed limit of 90 or 80 km/h. These expressways have few at-grade intersctions, and mostly use RIRO ramps to connect to intersecting roads.)
- Highway 400 at Barrie to Penetanguishene Rd.;
- Line 15 North to Carlyon Line (Orillia bypass);
- Simcoe County Rd. 169 at Washago to Southwood Rd. at Severn Bridge;
- Hewitt St. at Gravenhurst to Kirk Line at Bracebridge;
- Main St. in Huntsville to Station Rd. in Scotia;
- Highway 552 to Highway 522B (Trout Creek bypass);
- Highway 94 at Callander to Highway 17 in North Bay. The length of Highway 11 from Barrie to North Bay is currently planned to be upgraded to a fully controlled access highway in the long term; no 400-series designation is planned.
- Highway 17 is a freeway in 2 segments:
- In Sudbury, from Municipal Road 55 in Whitefish to MR 55 in Lively.
- The Whitefish to Lively section transitions to a two-lane freeway from Lively to MR 55 west of Coniston. This two-lane segment briefly transitions back to a divided freeway at the Highway 69 interchange, to ease future freeway conversion on the segment; the Ontario government has announced that the segment will be upgraded to full freeway in the early 2010s. These segments may be incorporated into a future expansion of Highway 417. Additionally, the expressway portion of Highway 17 near Sault Ste. Marie could also be upgraded into a full freeway in the future, but currently contains at-grade intersections.
- Highway 35/Highway 115 is a freeway in 3 segments:
- Highway 58 - Thorold (from 406 to Thorold Stone Rd. only) (segment expected to incorporate into medium-term Highway 420 plans)
- Highway 85 (see Conestoga Parkway above)
- Highway 137 - Connection to Interstate 81 in Ivy Lea (from Thousand Islands Parkway to Highway 401 only).
These include both municipal-constructed freeways and former provincial freeways downloaded to municipalities.
- Allen Road - Toronto (from Eglinton Avenue West to Transit Road only)
- Black Creek Drive - Toronto (Maple Leaf Drive to Weston Road; compromise for the cancellation of Highway 400 Extension)
- Burlington Street - Hamilton (from west of Kenilworth Avenue to QEW only)
- Don Valley Parkway - Toronto (from Gardiner Expressway to Highway 401-the entire length of the DVP)
- Dougall Parkway - Windsor (from Howard Avenue to Highway 401 only)
- E.C. Row Expressway - Windsor, also turns into a two-lane freeway
- Highbury Avenue - London (from Highway 401 to Hamilton Road only)
- Kingston Road Diversion/formerly Highway 2A - Scarborough (3.4km (2.1 mi) expressway from Lawson Road to Highway 401)
- Ontario Highway 27 - Toronto (In between 407/401)
- Gardiner Expressway - Toronto (from Don Valley Parkway to Highway 427-its entire length)
- Lincoln M. Alexander Parkway - Hamilton
- Red Hill Valley Parkway - Hamilton
- Regional Road 174 (Queensway East) (from 417 at Gloucester to Trim Road in Orleans only).
- Highway 3 - St. Thomas (from Wellington Rd. to Centennial Rd. only)
- Highway 6 - Argyle St. South to Green Rd. (Caledonia Bypass) and from Garner Road near Highway 403 to south of Airport Road in Hamilton. Both of these are two-lane freeways, although expansion is planned.
- Highway 7 - From Monaghan Parkway to Sherbrooke Street (Regional Road 9) east of Peterborough.
- Highway 17 is a two-lane freeway in 3 segments:
- In Greater Sudbury, where the freeway portion transitions to a two-lane freeway (see Highway 17 above)
- Highway 417's terminus at Arnprior to Haley Station, north of Renfrew. This 20 km stretch will likely be twinned to become an extension of Highway 417.
- County Road 40 south of Pembroke to north of Petawawa.
- Highway 17A (the Kenora bypass) is a 2-lane freeway in its entirety.
- Niagara Regional Road 27 - between Wellington street in Welland and Moyer road.
- Highway 40 (see Highway 40 below)
- Highway 58A is a 2-lane freeway for its entire length
- Highway 144 - between Chelmsford and Highway 17 near Lively, in Greater Sudbury.
- Highway 406 - between Port Robinson Rd. and Niagara Regional Road 27 in Welland.
- Niagara Regional Highway 525 - Between Highway 58A's eastern terminus (i.e. Highway 525's western terminus as well) and Miler Rd. (with Keefer Rd. as an L connector).
- Airport Parkway - Ottawa
- Monaghan Parkway - between Highway 7 and Brealy Dr.; between Brealy Dr. and Highway 115 as Sir Sanford Flemming Dr.
- Pike Creek Bypass - Lakeshore, Ontario (from terminus of E.C. Row Expressway to Essex County Road 2), has no grade-separations, only intersections, and no adjacent property access
- Sir Sanford Fleming Dr. (see above)
- Airport Parkway - is an expressway in Ottawa running from the Ottawa International Airport to Heron Road.
- Cootes Drive - Ancaster, Ontario/Hamilton, Ontario/Dundas, Ontario (formerly known as The King's Highway 102). First divided dual-carriageway in Canada and Ontario, built in mid-1930s near McMaster University.
- Eastgate Parkway in Mississauga is a divided at-grade expressway where it follows the old Highway 403 right of way from current Highway 403 to just west of Fieldgate Drive.
- Eastport Drive (Highway 7189) - Hamilton
- Exmouth St. is an expressway between Old Exmouth St. and Old London Rd. east of Sarnia
- Harbour Expressway - Thunder Bay
- Hanlon Parkway - Guelph
- Mud Street - between Lincoln M. Alexander Parkway/Red Hill Valley Parkway intersection and Regional highway 20 in the Hamilton area.
- Highway 7 is a brief expressway between Highway 115's eastern terminus and Keene Rd.
- Highway 11 - (see Thunder Bay Expressway)
- Highway 17 - (see Thunder Bay Expressway)
- Highway 17 - Sault Ste. Marie to Desbarats
- Highway 27 directly north of Highway 401 in Toronto, Ontario. It has four lanes of undivided traffic, and is fully controlled-access with interchanges and service roads to provide access to property in the area.
- Highway 40 is a four-lane divided expressway around the Sarnia area where it is known as the Sarnia Bypass. It is a two-lane freeway south of Sarnia as far south as Wallaceburg. Highway 40 is designed such that it can be upgraded to a full freeway, although it is unlikely since current traffic levels do not warrant the upgrade.
- Highway 58A is a 2-lane expressway in its entirety.
- Highway 140 is a 2-lane expressway in its entirety.
- Sir John A. Macdonald Parkway - is a four-lane scenic parkway/expressway from downtown Ottawa to Carling Avenue along the Ottawa River in Ottawa
- Municipal Road 55 in Greater Sudbury - from Municipal Road 24 (approximately one kilometre west of the Highway 17 interchange) in Lively to Big Nickel Mine Road
- Regional Road 420 - Former section of Highway 420 from Stanley Avenue to the Rainbow Bridge in Niagara Falls.
- Thunder Bay Expressway - Thunder Bay
- Veterans Memorial Parkway - London
- The Expresswaysite (Ontario section)
- Google Maps (satellite view helps fish out roads conforming to freeway and expressway criteria)