ontario highway commonly referred historically toronto colloquially series highway canadian province ontario linking city toronto urban agricultural south province scenic sparsely populated central northern regions portion highway toronto lake roughly traces route historic trail lower highest capacity route southern ontario canadian west connection highway serves primary route toronto southern areas collectively known cottage country highway patrolled speed limit mph section south speed limit mph second longest freeway province trans provincial longest fully controlled access highway ontario opened july date highway designated series freeway extended directions north south jane street widened 1970s construction freeway north highway lane freeway opened far north north end highway segment freeway operation section completed highway route present remains signed highway remaining gap opened stages expected completed route description originally known toronto route extended north projected reach eventual terminus length highway additional planned highway begins maple leaf drive toronto south south known black creek drive high speed commuter road planned southern extension completed jane street alongside expansion plans extend highway south expressway cancelled citizens groups protested proposal 1970s black creek drive built right way transferred metro toronto highway shifts northwestward turns approximately northward highway interchange widens lanes continues north toronto lanes avenue section highway suburban features short collector express system junction level stack interchange canada highway holland marsh freeway largely parallels arterial concession roads road jane street passing height land highway passes protected rural areas northern encounters rolling countryside south section near subject lies near edge highway passes trench places grade length route curving downtown north east outskirts right way continues highway exits degrees north west travelling alongside highway highway turns north east ski hills meet highway highway takes designation follows predominantly north western heading route highway planned terminus highway sections lane highway bypasses built communities way port highway meets rugged canadian shield winds way north granite flanked rock history initial construction modern freeways ontario planning toronto began routes connecting toronto time highway highway grading new alignment road jane street completed wilson avenue highway road onset korean war slowed construction highway considerably wasn december lanes direction opened traffic lanes opened traffic july point highway designated highway newspaper editor published numbers highway freeway featured grass median shortly completion struck october torrential caused catastrophic damage southern ontario flooding holland marsh depth bridges sections road washed away damaged highway bridges completely reconstructed water pumped away expansion highway extended north parallel super grade intersections construction begun extend highway highway sections opened traffic december years today older drivers portion north referred extension plans conceived extend freeway south highway avenue join new plans reach fruition public opposition urban cancelled highway construction toronto highway open far south jane street october rest plans shelved following cancellation expressway province right way valley construct lane divided expressway signalled intersections far south avenue originally known expressway transferred metropolitan toronto march named black creek drive exchange province given land purchased south avenue began additional lane direction created reducing median shoulder section widened highway avenue widened lanes soon section widened lanes year later lane freeway extended north highway lane highway north widened starting necessitated increasing use highway recreational tourists work involved construction southbound lanes parallel original metres median addition grade intersections converted grade separated interchanges work completed far highway north construction began section highway road completed end summer began roads bypassing west completed summer pace construction slowed temporarily foundations new structures settled fall contract awarded extend north complete interchange constructed late 1950s lane highway work completed year later fall structures constructed years construction began structures canadian national railway crossing north highway complete end construction began interchanges quarry road port road new service roads interchanges southbound structure highway following completion highway target completed study highway corridor road tower road southwest distance approximately work carried 1990s reaching far road extended north october interchange wasn constructed road october land claim dispute government ontario prevented highway oppose construction highway land requiring minimum voter turnout percent construction new alignment road began interchange highway site future freeway completed autumn construction south interchange started november section north interchange began months later february government officially committed complete highway sound work began projects result bypass new alignment south near segment connecting sound bypass segment freeway completed north sound bypass opened november section bypassed east old highway known park drive numbered moment october section south sound bypass lake road opened followed year later october opening bypass connecting sound segment point highway designation extended north designation remained place far south remaining gap eventually constructed starting december opened traffic summer completing freeway south designation removed south nobel early 2000s junctions road major extensively reconstructed modern configurations new partial interchange added accommodate opening shopping centre october lane direction nobel bypass opened traffic new lane bypass travels far north highway fully opened november route highway town renamed nobel drive reduced width lanes decommissioned lanes converted recreational trail businesses nobel affected opening new highway realignment closed february major affected highway heavy wind gusts near zero visibility total vehicles involved major collision ensued near beach road injuries reported highway closed day buses warm stranded motorists future june officially confirmed highway bypassed north highway announcement accompanied time line completion date set march acknowledged original completion date met announced current goal project completed work underway expand highway south lanes work completed southern end near nobel highway designation extended north construction began segment southwards route planning studies completed sound segment portions route opened traffic segments contracts fulfilled segment opened november nobel bypass highway opened october segment freeway remainder highway renumbered southern segment connected oldest series freeways vintage demolished recent years accommodate future expansion highway lane freeway section sixteen historic structures sub standard today freeway requirements remained summer slated replacement near future order preserve heritage created mould provincial coat arms 5th line located south replacement structures construction began north april replace crown hill junction highway new structure designed accommodate future highway expansion completed october original built 1950s demolished overnight closure december overall cost project million services service centres located highway maple king city centres originally leased operated major gasoline distributors companies chosen renew terms end response operation network service centres tender resulting year lease joint venture company subsidiary investment company operates brand service centres upgraded feature canadian tire gas station operated convenience store known market fast food brands southbound service centre included plans centre closed reconstruction october service centre relocated meters south october centre developments underway february reopened june moved new location north 4th line centres located following points highway exit list following table lists major junctions highway noted
Ontario Highway 400