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are often lined with residences, businesses, and farms. Without control of access, a municipal, state, or provincial government is obliged to provide a driveway access where the owner sees fit. In practice, road twinning projects are usually impractical in more populated regions and are more
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a road involves the construction of a similar or identical parallel road. It is usually done when an existing highway requires a significant increase in capacity. Twinning is frequently advantageous because it allows traffic capacity to be doubled and produces a
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typically done through non-agricultural corridors (except in cases where the twinned highway is not grade-separated and allows driveway access) with fewer settlements and have sections of new bypasses built around the settlements that do exist.
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The bypass (or sometimes an entirely-new highway) may be initially designed as a freeway, but often, the need for such a route is not immediately present. Instead, a two-lane road with no properties abutting it is constructed. A wide
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an established two- or four-lane highway. The older highways, constructed before travel demand on those routes was high or before the legislation of
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Twinning is often a public preference to reduce the dangers of overcrowded two-lane single carriageways, like sections of the
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and can be easily upgraded to a freeway by constructing interchanges and by twinning the road.
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is purchased in most cases so that enough property is available to simply
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FEDERAL, PROVINCIAL GOVERNMENTS OPEN NEWLY TWINNED SECTION OF HIGHWAY 101
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with separation between traffic directions and keeps the existing
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Road that involves the construction of a similar road
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101:Fatal accidents prompt call for road twinning
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34:Some freeways are constructed by
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122:This road-related article is a
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64:Trans-Canada Highway
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99:August 26, 2010.
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103:. CBC News.
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