as the extension of highway 400 approaches sudbury, the mto began a route planning and environmental assessment study on highway 17 easterly from highway 69 to markstay in 2010; studies for the segment from highway 69 westerly to the existing freeway in walden were completed in 2007. the current route plan involves twinning the existing southeast bypass to its terminus, along with the construction of a new four-lane route north of coniston and wahnapitae.