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Revision as of 16:00, 23 July 2006
The King's Highway No. 401 (named the Macdonald-Cartier Freeway) is a freeway that extends across Southern Ontario, Canada. It is the longest 400-Series Highway in Ontario, and among the busiest in the world.[1] Together with Quebec Autoroute 20, it is the road transportation backbone of the Quebec City-Windsor Corridor along which over half of Canada's population lives. Colloquially, the road is known simply as "The 401", spoken as "four-oh-one".
The first segment of the highway (originally designated Highway 2A) from Highland Creek (Scarborough) to Oshawa was begun in 1938 to bypass a congested section of nearby Highway 2. Much of the grading and a number of structures were completed before the onset of the Second World War, at which time most of the construction work was shut down. This section was finally completed and opened to traffic in 1947.
During the war years, the provincial government undertook a number of surveys and studies to determine the most desirable route for the new limited-access highway.
The highway was redesignated Highway 401 in 1952. The last segment, between Gananoque and Brockville, was completed in 1968 to bypass a section along the St. Lawrence River that included at-grade intersections and private entrances, now called the Thousand Islands Parkway. The last at-grade intersection on the present alignment was at Joyceville Road, east of Kingston, which was converted to an interchange with the final 1968 construction.
In 1965, Ontario Premier John Robarts designated Highway 401 the Macdonald-Cartier Freeway, in honour of Sir John A. Macdonald and Sir George-Étienne Cartier, the Province of Canada's most important Fathers of Confederation, in honour of Canada's upcoming Centennial Celebrations in 1967. This name is found on maps and official documents, but seldom used in conversation or on modern road signs.
Overview
Highway 401 begins at Highway 3, 13 kilometres (8.08 miles) from the Detroit River on the outskirts of Windsor (not at the Michigan border as some mistakenly assume) and ends at the Quebec border, 815 kilometres (506.42 miles) away. There are 18 rest areas or service centres (oases) located along the route, allowing motorists to access services without leaving the highway. A plaque was erected at the Mallorytown oasis, located on the last section of the freeway to be completed, stating that the 401 was the longest non-toll freeway under a single highway authority in North America. This record was later supersceded by the Texas section of Interstate 10.
Cities along the route of the highway include Windsor, Chatham, London, Ingersoll, Woodstock, Kitchener, Cambridge, Guelph, Milton, Mississauga, Toronto, Pickering, Ajax, Whitby, Oshawa, Cobourg, Trenton, Belleville, Kingston, Brockville, and Cornwall. Of these localities, Windsor, London, Toronto, Kingston, and Cornwall (from west to east) are designated as control cities.
Major freeway junctions are located at these roads and highways: 402, Highbury Avenue (London), 403, 8, 6, 407, 410, 427, 400, William R. Allen Road (Toronto), 404 and Don Valley Parkway (Toronto), 35 and 115, 416. Quebec Autoroute 20 continues the highway at its eastern end.
There are no direct interchanges with U.S. Interstate highways, but Interstates 75 and 375 in Detroit, Michigan, and Interstate 81 in New York State are each a short distance away, via Ontario highways 3, the former 3B, and 137, leading respectively to the Ambassador Bridge, the Detroit-Windsor Tunnel, and the Thousand Islands Bridge.
Transportation corridor
The 401 is widely considered to be North America's busiest highway, with an estimated Annual Average Daily Traffic (AADT) of over 425,000 in 2004, between the Weston Road and Highway 400 interchanges in Toronto. This surpasses the Santa Monica Freeway in Los Angeles, and several Interstate freeways in Houston, Texas. Due to its triple use as the main trade, commuting and recreational corridor in Ontario, 24-hour traffic volumes can exceed the 500,000 level on some days. The just-in-time inventory systems of the highly integrated auto industry in Michigan and Ontario have made the highway the busiest truck route in North America. Highway 401 also includes the continent's busiest multi-structure bridge at Hogg's Hollow in Toronto (four structures for the highway's four roadway beds).
The 401 is the most important highway in Canada, as it connects the populous Southern Ontario region with Quebec and Michigan, while also connecting to most other major highways in the province. The highway also serves as the principal connection to Montreal and points east, including New England, becoming Autoroute 20 at the Quebec border. The border crossing at Windsor and Detroit is the busiest trade crossing in the world, and although the 401 itself does not physically extend the last few kilometres into Detroit, it is the only route from Toronto to Windsor and on to Interstate 75. A future expansion of the Windsor-Detroit border crossing, which will include a freeway bypass of the existing Highway 3, may result in Highway 401 having a direct freeway link to the border. Some 40 % of Canada-US trade travels the highway, which is one-third of Canada's foreign trade, and 4 % of all US foreign trade.
Collector-Express Setup
Today the stretch of Highway 401 that passes through the Greater Toronto Area ranges from 6 to 18 lanes, and the stretch between Highway 403 and Brock Road in Pickering is thought to be the world's longest continuous stretch of highway having 10 or more lanes.
Islington Avenue to Brock Road
The section that now runs through Toronto was a rural roadway that was entirely outside of the Toronto city limits when first opened, and was originally referred to as the Toronto Bypass. The new freeway attracted development all along its length. As the city's suburbs grew, it quickly became an urban commuter road, rather than a long-distance bypass route as was originally planned, leading to extensive traffic jams. This was a problem/opportunity solved and built upon to some extent by implementing separate express and collector lanes, similar to the express/local set-up of the Dan Ryan Expressway in Chicago. By 1967 Highway 401 was widened from four lanes to 12 or more through Toronto from Islington Avenue to Warden Ave.In the early 1970s the collector express lanes were extended to Neilson Road and eastward to Brock Road by 1997. An alternative plan to the collector-express setup was to construct a bypass of Highway 401. This project was revived in 1987 and opened in 1997 as the toll road Highway 407 ETR to parallel Highway 401 in the Greater Toronto Area.
The main collector-express setup with a minimum 12 lane cross-section currently stretches from Islington Avenue to Brock Road. Highway 409 which branches off from Highway 401 just west of Islington to Toronto Pearson International Airport has been unsuccessful in diverting traffic volumes; the 10 lane segment between Islington and Highway 427 is highly congested as a result. The existing 401-427 interchange is considered one of the worst bottlenecks since it only allows 8 lanes of traffic (4 in each direction) to pass through the interchange. It initially only allowed 6 lanes of through traffic until a widening project was completed in 2005; a major reconstruction of the junction is needed to meet current demands estimated at 5-6 lanes.
Highway 403/410 to Highway 427
Highway 401 has a separate collector-express system in Mississauga between the junctions with Highways 403/410 and Highway 427. This was completed in 1986, concurrent with the expansion of the 401-403 interchange and the addition of two express flyover ramps and includes an eastbound collector-express transfer known as the "Tunnel". At 18 lanes wide this is the widest section of Highway 401, although at the present only 9 lanes are designated for 401 through traffic (as express lanes) while the collector lanes serve as direct connections or ramp extensions from 403/410 to 427. The existing 401/427 interchange remains a bottleneck to possible east expansion of this configuration that would link it up with the Islington-Brock collector-express system. Another choke point is at the 403/410 interchange since the 401 narrows down to 6 lanes west of that junction. However, that junction has been designed with westward expansion of the collector-express system in mind; several prerequisite projects to accommodate widening from 403/410 to Missisauga Road were underway in the late 1990s, including a new interchange at Mavis Road and the reconstruction of the Missisauga Road and Derry Road overpasses.
Future expansion and upgrades
A plan is currently underway by the Ministry of Transportation to widen the highway to at least six lanes for its length from Windsor to the Quebec border. In the 1950s, Highway 401 had initially been constructed as a 4 lane divided highway but the narrow grass median has since proven insufficient in preventing cross-directional collisions. In 1999, the Windsor-London stretch of Highway 401 was infamously known as "Carnage Alley" after a slew of fatal accidents, including an 87 vehicle pileup on Labour Day during thick fog that claimed seven lives. Much of the upgrade work will involve replacing the median with an "Ontario tall-wall" concrete barrier and an extra lane per direction.
The first sections to see these upgrades are between Windsor and Tilbury, around the City of Kingston, the London area, from Port Hope to Cobourg, and west from Cambridge towards Woodstock. This will be followed later by staged upgrades between Trenton and Belleville, and eventually the remaining sections between Cobourg and Kingston. Other sections, namely between London and Chatham, and east of Kingston, remain beyond the 30-year planning horizon.
On November 14, 2005, the joint Canadian-American committee studying the options for expanding the Windsor - Detroit border crossing announced that its preferred option was to directly extend Highway 401 westward, using a new bridge or tunnel to cross the Detroit River and interchange with Interstate 75 somewhere between the existing Ambassador Bridge span and Wyandotte. The exact route of this new highway connection has not yet been determined. [2]
The Ontario government is also planning to widen the Missisauga stretch from 6 lanes to 12 lanes from the 403-410 interchange to the Credit River, and 10 lanes to Mississauga Road. The Derry Road underpass and Mississauga Road overpass have been widened to accommodate this, while a new interchange has been added at Mavis Road. The main obstacles to Highway 401 expansion are the aging Creditview Road, McLaughlin Road, and Hurontario Street overpasses which will be demolished and replaced as part of the reconstruction.
The busy Wellington Road interchange at London will be completely redesigned and rebuilt beginning in 2006.
A long term plan is to extend the 12-lane express/collector system as far west as Guelph and Kitchener.
Traffic Cameras
To manage traffic, the Ontario Ministry of Transportation (MTO) installed the COMPASS Freeway Traffic Management System, the most advanced of its kind in the world when it was deployed in 1991. Using a combination of CCTV cameras, vehicle detection loops and LED changeable message signs, the MTO Traffic Operations Centre can obtain a real-time assessment of traffic conditions and alert highway travellers of collisions and construction. The system currently stretches from Highway 403, Mississauga to Harwood Avenue, Ajax, and is likely to be extended westward and eastward as Highway 401 is reconstructed and upgraded.
Volume information (2003)
- Highest Volume: 410,000 AADT from Weston Road (Exit 357) to Highway 400 (Exit 359)
- Lowest Volume: 15,200 AADT from Stormont, Dundas and Glengarry County Road 41 (Exit 758) to Stormont, Dundas and Glengarry County Road 14 (Exit 770)
Interchanges from west to east
There are over 150 interchanges on Highway 401 between Windsor and Quebec Autoroute 20 at the Ontario/Quebec border. The reconstruction of Highway 401 in Missisauga is expected to add several interchanges in order to serve that fast-growing region. Another widening project throughout Oshawa would see old interchanges closed in favour of newer ones, although the only possible extension of Highway 401 would be northwestward from Windsor to connect directly into Michigan.
Construction is currently underway for a new interchange (designated Exit 415) located at Stevenson Road (Durham Road 53) in Oshawa. This upgrade with new ramps and bridges will be easier access to the General Motors plant and the Oshawa Centre. It will also replace the outdated Park Road interchange that will be closed off in either 2009 or 2010.
The highest numbered exit - 825 - is the second highest number for the last exit of a highway in North America, behind Exit 880 on Interstate 10 in Texas (although if this highway was signed in miles, it would be Exit 513, well behind many highways in several US states).
| Municipality | # | Intersecting Road(s) | Notes |
|---|---|---|---|
| Windsor | 11* | Huron Church Road (Highway 3) | Access only to northbound/from southbound Huron Church; to  Interstate 75 via Ambassador Bridge
|
| Tecumseh | 13 | Dougall Parkway | Westbound exit and eastbound entrance; to  Interstate 375 and  M-10 via Detroit-Windsor Tunnel
|
| 14 | Provincial Road (Essex County Road 46) | ||
| Lakeshore | 21 | Manning Road (Essex County Road 19) | |
| 28 | Puce Road (Essex County Road 25) | ||
| 34 | Belle River Road (Essex County Road 27) | ||
| 40 | St. Joachim Road (Essex County Road 31) | ||
| 48 | Highway 77/Comber Road (Essex County Road 35) to Leamington | ||
| 56 | Essex County Road 42 to/from Tilbury) | ||
| Chatham-Kent | 63 | Queen's Line (Chatham-Kent Road 2) to/from Tilbury | |
| 81 | Bloomfield Road (Chatham-Kent Road 27) | ||
| 90 | Communication Road (Highway 40 and Chatham-Kent Road 11 to Chatham) | ||
| 101 | Kent Bridge Road (Chatham-Kent Road 15) and Rondeau Provincial Park | ||
| 109 | Chatham-Kent Roads 17 and 21 (to Ridgetown and Thamesville) | ||
| 117 | Orford Road (Chatham-Kent Road 20) | ||
| West Elgin | 129 | Furnival Road (Elgin County Road 103) | |
| 137 | Graham Road (Elgin County Road 76) (to West Lorne) | ||
| Dutton-Dunwich | 149 | Currie Road (Elgin County Road 8) | |
| Southwold | 157 | Iona Road (Elgin County Road 14) | |
| 164 | Union Road (Elgin County Road 20) (to Shedden) | ||
| London | 177 | Colonel Talbot Road (Highway 4 to St. Thomas, Port Stanley and Lambeth) | |
| 183 | Highway 402 | Westbound exit and eastbound entrance | |
| 186 | Wellington Road/Exeter Road | Currently split into 186A and 186B westbound, but will become a single ramp westbound after interchage reconstrution; No direct access to Exeter Road from eastbound 401 | |
| 189 | Highbury Avenue | ||
| 194 | Airport Road (London) | ||
| Thames Centre | 195 | Middlesex County Road 74 | |
| 199 | Dorchester Road (Middlesex County Road 32) | ||
| 203 | Middlesex County Road 73 (to Aylmer) | ||
| 208 | Putnam Road (Middlesex County Road 30) | ||
| South-West Oxford | 216 | Culloden Road (Oxford County Road 10) (Ingersoll) | |
| 218 | Plank Line (Highway 19, Oxford County Road 119) (Tillsonburg | ||
| 222 | Foldens Line (Oxford County Road 6) Zorra | ||
| Woodstock Boundary | 230 | Mill Street (Oxford County Road 12) | |
| 232 | Norwich Avenue (Oxford County Road 59) Delhi | ||
| Norwich | 235 | Highway 403 | Eastbound exit and westbound entrance |
| 236 | Towerline Road (Oxford County Road 15) | ||
| 238 | Oxford County Road 2 | ||
| Blandford-Blenheim | 250 | Drumbo Road (Oxford County Road 29) (Innerkip) | |
| North Dumfries | 268 | Cedar Creek Road (Waterloo Road 97) to Ayr | |
| Kitchener | 275 | Homer Watson Boulevard/Fountain Street (Waterloo Road 28) | |
| 278 | Highway 8/King Street (Waterloo Road 8) | Split into 278A and 278B; westbound split via collector-distributor road | |
| Cambridge | 282 | Hespeler Road (Waterloo Road 24)/Highway 24 | |
| 284 | Franklin Boulevard (Waterloo Road 36) | Eastbound exit and westbound entrance | |
| 286 | Townline Road | ||
| Puslinch | 295 | Hanlon Parkway/Highway 6 North to Guelph) | Begin multiplex with 6 |
| 299 | Highway 6 South/Brock Road (Wellington County Road 46) | End multiplex with 6 Photo | |
| Milton | 312 | Guelph Line (Halton Road 1) (Campbellville, Burlington and Rockwood) | Photo |
| 320 | Halton Road 25 to (Acton) | Photo | |
| 324 | James Snow Parkway (Halton Road 4) | Photo | |
| Halton Hills | 328 | Trafalgar Road (Halton Road 3) (Georgetown, Oakville) | Photo |
| Mississauga | 330 | Highway 407 ETR | Photo |
| 333 | Winston Churchill Boulevard (Peel Road 19) | Photo | |
| 336 | Mississauga Road/Erin Mills Parkway (Peel Road 1) | Photo | |
| 340 | Mavis Road | Photo | |
| 342 | Hurontario Street (Highway 10) | Photo | |
| 344 | Highway 403/Highway 410 to Brampton | Collector-express system begins; no access between 401 eastbound and 403 - Photo | |
| 346 | Dixie Road (Peel Road 4) | Photo | |
| 348 | Renforth Drive | Eastbound exit and westbound entrance Photo | |
| Toronto | 351 | Highway 427 | Eastbound collectors default onto 427; collector-express system ends |
| 352 | Carlingview Drive | Westbound exit and eastbound entrance | |
| 354 | Dixon Road/Martin Grove Road | ||
| 355 | Highway 409 | Westbound exit and eastbound entrance; collector-express system resumes | |
| 356 | Islington Avenue | ||
| 357 | Weston Road | ||
| 359 | Highway 400/Black Creek Drive | 400 also accessible from eastbound express | |
| 362 | Keele Street | ||
| 364 | Dufferin Street | No westbound exit | |
| 365 | William R. Allen Road | Also accessible from westbound express | |
| 366 | Bathurst Street/Wilson Avenue | Westbound exit and eastbound entrance | |
| 367 | Avenue Road | ||
| 369 | Yonge Street | ||
| 371 | Bayview Avenue | ||
| 373 | Leslie Street | ||
| 375 | Highway 404/Don Valley Parkway | Also accessible from express in both directions | |
| 376 | Victoria Park Avenue | ||
| 378 | Warden Avenue | ||
| 379 | Kennedy Road | ||
| 380 | Brimley Road/Progress Avenue | Eastbound exit only to Brimley southbound and Progress; westbound entrance only from Brimley northbound | |
| 381 | McCowan Road | ||
| 383 | Markham Road | ||
| 385 | Neilson Road | ||
| 387 | Morningside Avenue | ||
| 389 | Meadowvale Road | Access to Toronto Zoo | |
| 390 | Kingston Road/Port Union Road | Eastbound exit and westbound entrance | |
| 392 | Kingston Road/Sheppard Avenue | Westbound exit and eastbound entrance | |
| Pickering | 394 | Whites Road (Durham Road 38) | |
| 397 | Liverpool Road (Durham Road 29) | Westbound only | |
| 399 | Brock Road (Durham Road 1) | ||
| Ajax | 401 | Westney Road (Durham Road 31) | |
| 404 | Salem Road (Durham Road 41) | ||
| Whitby | 410 | Brock Street (former Highway 12/Durham Road 46) | Signed incorrectly as Durham Road 12 |
| 412 | Thickson Road (Durham Road 26) | ||
| Oshawa | 415* | Stevenson Road (Durham Road 53) | Future replacement of Park Road interchange |
| 416 | Park Road (Durham Road 54) | Interchange to be closed in 2010, replaced by Stevenson Road | |
| 417 | Simcoe Street (Durham Road 2) | Eastbound exit and westbound entrance | |
| 418 | Ritson Road (Durham Road 16) | Westbound access to Simcoe Street | |
| 419 | Harmony Road (Durham Road 33)/Bloor Street (Durham Road 22) | ||
| Clarington | 425 | Courtice Road (Durham Road 34) | |
| 428 | Holt Road | Eastbound exit and westbound entrance | |
| 431 | Waverley Road (Durham Road 57) (Bowmanville) | ||
| 432 | Liberty Street (Durham Road 14) (Bowmanville) | ||
| 435 | Bennett Road | ||
| 436 | Highway 35/Highway 115 | ||
| 440 | Mill Street (Durham Road 17) (Newcastle) | ||
| 448 | Newtonville Road (Durham Road 18) | ||
| Port Hope | 456 | Wesleyville Road | |
| 461 | Toronto Street (Northumberland County Road 2) | ||
| 464 | Ontario Street (Northumberland County Road 28 - formerly Highway 28) to Peterborough | ||
| Cobourg | 472 | Burnham Street (Northumberland County Road 18) | |
| 474 | Northumberland County Road 45 (Baltimore) | ||
| Alnwick/Haldimand | 487 | Aird Street (Northumberland County Road 23) (Grafton) | Formerly Lyle Street |
| Cramahe | 497 | Percy Street/Big Apple Road (Northumberland County Road 25) (Colborne) | |
| Brighton | 509 | Northumberland County Road 30 (Campbellford) | |
| Quinte West | 522 | Wooler Road (Hastings Road 40) | |
| 525 | Hastings Road 33 (Trenton) | ||
| 526 | Glen Miller Road (Hastings Road 4) | ||
| 538 | Wallbridge-Loyalist Road (Hastings Road 1) | ||
| Belleville | 543 | Highway 62 (Madoc, Picton) | Name "North Front Street" not signed |
| 544 | Highway 37 (Tweed) | Name "Cannifton Road" not signed | |
| Tyendinaga Mohawk Territory | 556 | Shannonville Road | |
| 566 | Highway 49/Marysville Road (Lennox and Addington County Roads 15 and 49) | ||
| Greater Napanee | 570 | Deseronto Road (Lennox and Addington County Road 10) | |
| 579 | Lennox and Addington County Road 41 | ||
| 582 | Palace Street (Lennox and Addington County Road 5) | ||
| Loyalist | 593 | Camden East Road (Lennox and Addington County Road 4) | |
| 599 | Wilton Road (Lennox and Addington County Road 6) | ||
| Kingston | 611 | Gardiners Road (Kingston Road 38) | |
| 613 | Sydenham Road (Kingston Road 9) | ||
| 615 | Sir John A. Macdonald Boulevard | ||
| 617 | Division Street/Perth Road (Kingston Road 10) | ||
| 619 | Montreal Street/Battersea Road (Kingston Road 11) | ||
| 623 | Highway 15/Kingston Road 15 | ||
| 632 | Joyceville Road (Kingston Road 16) | ||
| Gananoque | 645 | Leeds and Grenville County Road 32 | |
| 647 | Thousand Islands Parkway/Leeds and Grenville County Road 2 | Eastbound exit and westbound entrance | |
| Leeds and the Thousand Islands | 648 | Leeds and Grenville County Road 2 | Westbound exit and eastbound entrance |
| 659 | Reynolds Road (Leeds and Grenville County Road 3) | ||
| 661 | Highway 137 | To  Interstate 81 via Thousand Islands Bridge
| |
| Front of Yonge | 675 | Mallorytown Road (Leeds and Grenville County Road 5) | |
| Elizabethtown-Kitley | 685 | Thousand Islands Parkway | Westbound exit and eastbound entrance |
| 687 | Leeds and Grenville County Road 2 | ||
| Brockville | 696 | Stewart Boulevard (Leeds and Grenville County Road 29) | |
| 698 | North Augusta Road | ||
| Augusta | 705 | Leeds and Grenville County Road 15 | |
| Prescott | 716 | Edward Street (Leeds and Grenville County Road 18) | |
| Edwardsburgh/Cardinal | 721 | Highway 416/Highway 16 | Split interchange; to File:NY-812.png NY 812 and File:NY-37.png NY 37 via Ogdensburg-Prescott International Bridge |
| 730 | Shanly Road (Leeds and Grenville County Road 22) (Cardinal) | ||
| South Dundas | 738 | Carman Road (Stormont, Dundas and Glengarry County Road 1) (Iroquois) | |
| 750 | Stormont, Dundas and Glengarry County Road 31 (Morrisburg) | ||
| 758 | Upper Canada Road | ||
| South Stormont | 770 | Dickinson Drive (Stormont, Dundas and Glengarry County Road 14) (Ingleside) | |
| 778 | Moulinette Road (Stormont, Dundas and Glengarry County Road 35)(Long Sault) | ||
| 786 | Eastbound exit and westbound entrance | ||
| Cornwall | 789 | Brookdale Avenue (Highway 138 (Ontario)) | To File:NY-37.png NY 37 via Seaway International Bridge |
| 792 | McConnell Avenue (Stormont, Dundas and Glengarry County Road 42) | ||
| 796 | Boundary Road (Stormont, Dundas and Glengarry County Road 44) | ||
| South Glengarry | 804 | Summerstown Road (Stormont, Dundas and Glengarry County Road 27) | |
| 814 | Stormont, Dundas and Glengarry County Road 34 (Lancaster) | ||
| 825 | Fourth Line Road (Stormont, Dundas and Glengarry County Road 23) | ||
| Continues as File:A-20-new.png Autoroute 20 in Quebec | |||
- *Exit number not signed, based on kilometre post
- Presumably the kilometre numbers start at 11 because of plans of a possible extension to the Canada-US border, although that is not confirmed.
- References
- Cameron Bevers, The History of Ontario's Kings Highways at http://www.thekingshighway.ca/
- Scott Steeves, www.ONTHIGHWAYS.com at http://www.onthighways.com/
- Microsoft Streets and Trips 2005
Lane configuration from west to east
| Section | Lane Configuration |
|---|---|
| Huron Church Road/Highway 3 to Essex County Road 42 | 2 Lanes in Each Direction 1 additional lane in each direction currently under construction |
| Essex County Road 42 to Highway 402 | 2 Lanes in Each Direction 1 additional lane in each direction currently planned |
| Highway 402 to Highway 403 | 3 Lanes in Each Direction |
| Highway 403 to Northumberland Street (Waterloo Regional Road 50) | 2 Lanes in Each Direction 1 additional lane in each direction currently under construction |
| Northumberland Street to Hurontario Street (Highway 10) | 3 Lanes in Each Direction |
| Hurontario Street to Highway 410/Highway 403 | 3 Lanes Eastbound currently being upgraded to 3 Express, 3 Collector 4 Lanes Westbound currently being upgraded to 3 Express, 3 Collector |
| Highway 410/Highway 403 to Toronto Airport Basketweave | 9 Lanes Eastbound 5 Express, 4 Collector 9 Lanes Westbound 4 Express, 5 Collector |
| Toronto Airport Basketweave to Highway 427/Eglinton Avenue | 9 Lanes Eastbound 4 Express, 5 Collector 9 Lanes Westbound 5 Express, 4 Collector |
| Under the Highway 427 Interchange | 4 Lanes in Each Direction |
| Highway 427/Carlingview Drive to Highway 409 | 5 Lanes in Each Direction |
| Highway 409 to Highway 400 | 7 Lanes in Each Direction 4 Express, 3 Collector |
| Highway 400 to The Basketweave | 8 Lanes in Each Direction 4 Express, 4 Collector |
| The Basketweave to Allen Road | 7 Lanes in Each Direction 4 Express, 3 Collector |
| Allen Road to Don River | 7 Lanes in Each Direction 3 Express, 4 Collector |
| Don River to Yonge Street | 6 Lanes in Each Direction 4 Express, 2 Collector 1 additional collector lane in each direction currently under construction |
| Yonge Street to Bayview Avenue | 7 Lanes in Each Direction 4 Express, 3 Collector |
| Bayview Avenue to Highway 404/Don Valley Parkway | 7 Lanes in Each Direction 3 Express, 4 Collector |
| Highway 404/Don Valley Parkway to Kennedy Road | 8 Lanes in Each Direction 4 Express, 4 Collector |
| Kennedy Road to Markham Road/Highway 48 | 7 Lanes in Each Direction 3 Express, 4 Collector |
| Markham Road/Highway 48 to Neilson Road | 6 Lanes in Each Direction 3 Express, 3 Collector |
| Neilson Road to Whites Road (Durham Regional Road 38) | 7 Lanes in Each Direction 4 Express, 3 Collector |
| Whites Road to Brock Road (Durham Regional Road 1) | 7 Lanes in Each Direction 3 Express, 4 Collector |
| Brock Road to Westney Road (Durham Regional Road 31) | 5 Lanes in Each Direction |
| Westney Road to Salem Road (Durham Regional Road 41) | 4 Lanes in Each Direction |
| Thickson Road to Port Hope | 3 Lanes in Each Direction |
| Port Hope to Kingston western city limits | 2 Lanes in Each Direction |
| Kingston western city limits to Sydenham Road (Frontenac County Road 9) | 3 Lanes in Each Direction |
| Sydenham Road to Montreal Street (Frontenac County Road 11) | 2 Lanes in Each Direction 1 additional lane in each direction currently under construction |
| Montreal Street to Highway 15 | 2 Lanes in Each Direction 1 additional lane in each direction currently planned |
| Highway 15 to Quebec Border | 2 Lanes in Each Direction |