ontario highway king highway commonly referred highway maintained highway canadian province ontario begins highway midway london ends highway highway highway roadway referred remains close eastern shoreline highway designated highway highway extended year later final extension completed route portion route south highway transferred counties laid highway subject winter lake effect caused create sudden conditions shoreline emergency routes established inland guide drivers care taken winter months storms progress rapidly unexpectedly route description long route southwestern ontario serves numerous communities eastern shoreline kilometres longer today highway begins highway near community progresses north towns forest port southampton southampton highway away shoreline travels east route generally smoothly flowing somewhat towns summer tourists highway subject points lies lee shore lake effect snow frequently subject motorists poor visibility slippery conditions leading conditions claim road closed province highway provides alternative inland route highway begins exit progresses north straight section route lies passes town forest near point route abruptly curves north west begins parallel shore lake providing access village port prior entering north village highway crosses intersects highway point west highway dominated roads providing access shoreline cottages route encounters highway crosses river bypass constructed early 1960s original routing followed portions river ridge crescent highway proceeds straight north shore reaches surveying grid changes orientation highway follows forced road approximately inland lake north encounters highway travels enters route curves northeast enters align surveying grid proceeds travels straight arrow originally rural concession road corners bypasses inland intersecting western terminus highway acts primary town serving traffic turn remain highway exits southeast town highway makes broad curve northeast continues approaches southern end route curves abruptly passes southampton curving east places highway generally straight boundary descent communities line inland stretch highway including jackson route encounters highway joins highway form ontario wrong way concurrency east history highway assumed highway highway original section highway changed road circa hamilton businessman set day drought dig chose spot downhill existing oil village instead encountering water williams hit shallow oil deposit result ensuing oil boom begin petroleum industry north_america williams laid village changed competing road companies formed williams principal investor florence road company aimed roads roads constructed company prosperous significant portion florence road closed turned local property owners transformed muddy path maintained road miles road south wyoming paved remainder south followed years later oil boom faded improvement road assumed road highway corner highway dresden provincial highway changed current year department set improve new highway concrete laid highway kilometre section dresden following year route paved dresden effects great depression forced department concentrate paving highway election new government led resumption work june depression relief project new equipment expertise engineer hired demonstrated abilities machinery passing construction site drive home newman helped design machine operate allowed work proceed faster rate machinery dig quicker men effort showed gap remaining gaps dresden graded paved end summer october highway officially opened deputy minister april highway assumed far north followed assumption section april creating kilometres concurrency highway route travelled merged present highway final kilometre extension assumed bringing highway greatest length kilometres april department assumed control road connecting highway forest highway later extended connect port august highway renumbered highway highway renumbered highway beginning small bypass highway constructed north avoiding nearby turn curving structure completed cost million opened july early 1980s construction highway east resulted shift route highway route extended north exit section highway north exit downloaded transferred local municipality resided transfers performed april section highway highway south transferred january section transferred kent counties major intersections following table lists major junctions highway noted
Ontario Highway 21