Ontario

=== Roads ===
{{Main|Roads in Ontario}}
[[File:Highway 400 Seguin.jpg|thumb|[[Ontario Highway 400|Highway 400]] in [[Seguin, Ontario|Seguin]]. The roadway forms a part of the province's [[400-series highway]]s.]]
[[400-series highways]] make up the primary vehicular network in the south of province, and they connect at a number of points to border crossings to the [[United States]], and [[Quebec]], the busiest being the [[Detroit–Windsor Tunnel]] and [[Ambassador Bridge]] and the [[Blue Water Bridge]] (via [[Ontario Highway 402|Highway 402]]). Some of the primary highways along the southern route are [[Ontario Highway 401|Highway 401]], [[Ontario Highway 417|Highway 417]], and [[Ontario Highway 400|Highway 400]],<ref name=Ontario>{{cite web |title=Ontario government investing $401&nbsp;million to upgrade Highway 401 |url=http://ogov.newswire.ca/ontario/GPOE/2002/08/06/c0057.html?lmatch=&lang=_e.html |archive-url=https://web.archive.org/web/20070914064434/http://ogov.newswire.ca/ontario/GPOE/2002/08/06/c0057.html?lmatch=&lang=_e.html |archive-date=September 14, 2007 |access-date=December 20, 2006 |date=August 6, 2002 |author=Ministry of Transportation (Ontario)}}</ref><ref name=Highway>{{cite web
|url=http://www.urbanplanet.org/forums/index.php?showtopic=3459
|title = GTA Economy Dinged by Every Crash on the 401 – North America's Busiest Freeway
|author = Brian Gray
|publisher = [[Toronto Sun]], transcribed at Urban Planet
|date = April 10, 2004
|access-date = March 18, 2007
|quote = The 'phenomenal' number of vehicles on Hwy. 401 as it cuts through Toronto makes it the busiest freeway in the world...
|archive-date = December 27, 2009
|archive-url=https://web.archive.org/web/20091227131438/http://www.urbanplanet.org/forums/index.php?showtopic=3459
|url-status = live
}}</ref> Highway 401 being the busiest highway in North America.<ref>{{Cite news |last=Clark |first=Andrew |date=2023-04-28 |title=The defining characteristic of Ontario's 400-series highways is immense boredom punctuated by sudden fear |work=The Globe and Mail |url=https://www.theglobeandmail.com/drive/mobility/article-the-defining-characteristic-of-ontarios-400-series-highways-is-immense/ |access-date=2023-10-04 |archive-date=June 3, 2023 |archive-url=https://web.archive.org/web/20230603054624/https://www.theglobeandmail.com/drive/mobility/article-the-defining-characteristic-of-ontarios-400-series-highways-is-immense/ |url-status=live }}</ref> Other [[List of provincial highways in Ontario|provincial highways]] and regional roads inter-connect the remainder of the province, and the [[Trans-Canada Highway]] connects the province to the rest of the country.<ref>{{cite report
 |title = Draft Technical Backgrounder: Highways and Roads
 |author = IBI Group
 |publisher = Ministry of Transportation of Ontario
 |date = November 2016
 |page = 7
 |url = https://northernontariommts.files.wordpress.com/2016/11/ttr_hwys_techbackgrounder_draft-2016-11-29.pdf
 |access-date = March 9, 2021
 |archive-date = December 11, 2020
 |archive-url = https://web.archive.org/web/20201211210949/https://northernontariommts.files.wordpress.com/2016/11/ttr_hwys_techbackgrounder_draft-2016-11-29.pdf
 |url-status = live
}}</ref><ref>{{Cite web |title=Trans-Canada Highway |url=https://www.thecanadianencyclopedia.ca/en/article/trans-canada-highway |access-date=2023-10-06 |website=www.thecanadianencyclopedia.ca |archive-date=August 25, 2023 |archive-url=https://web.archive.org/web/20230825191032/https://www.thecanadianencyclopedia.ca/en/article/trans-canada-highway |url-status=live }}</ref>