Southwest and Southeast Bypasses

The Southwest Bypass east of its interchange with Long Lake Road (Municipal Road 80).

The Southwest Bypass's western terminus is at the Highway 17 freeway's interchange with Municipal Road 55. The first kilometre east of the interchange is a transition from the Highway 17 freeway back down to a two-lane highway. The bypass then runs to a parclo interchange at Long Lake Road, and then another parclo, 1 km further east with Highway 69, where around it widens to four lanes; at this point the Southwest Bypass ends and the Southeast Bypass begins. The southeast segment runs for approximately 10 km, passing between the Lake Laurentian Conservation Area and Daisy Lake Uplands Provincial Park. It meets no roads for its entire length (it crosses over but does not interchange with Bancroft Drive), before ending at a signalized intersection with Municipal Road 55 approximately 2 km west of Coniston. Traffic on Highway 17 must turn right to continue on the highway.

Prior to the construction of the bypasses, the Highway 17 designation belonged to what is now Municipal Road 55.

The Southwest Bypass was opened in 1974 as a local route primarily designed to reduce traffic pressure on the main highway by offering an alternate route into the city from Walden and points west, as well as enabling through traffic to travel between the two provincial highways without needing to directly enter the city's urban street network. The road was considered part of the provincial highway system, although it was designated with a secret 7000-series number and was never signed as a provincial highway — only with trailblazers to Highway 69 eastbound and Highway 17 westbound.

When the Highway 17 freeway route through Walden was completed in 1980, the Southwest Bypass terminus in Lively became the freeway's eastern interchange point. The former Highway 17 route through Walden was downloaded to the city, although the route east of the interchange remained part of Highway 17 until the Southeast Bypass was completed in 1995.

The provincial government previously announced that the road would be converted to freeway in the 2010s, around the same time that Highway 400 supersedes Highway 69 to Sudbury, although as of 2019 no firm date has been announced for commencement of construction. The Ministry of Transportation prepared and published its preferred plan for the southwest segment in the 2000s; planning on the southeast segment, from Highway 69 to Coniston with a potential further extension to Markstay, began in fall 2010.[2] A preliminary four-lane plan for the southeast segment, as well as a new connection to Highway 69, was prepared in 1987 as part of the original route plan; however, due to a number of changes in the area, including the four-lane realignment of Highway 69 and the creation of Daisy Lake Uplands Provincial Park, modifications were needed to the final route plan.[2]

A 100-metre right of way has been designated since the 1970s for expansion of the Southwest Bypass to four lanes,[3] which has left the route largely undeveloped despite the fact that it passes quite close to an urbanized part of the city.

The interchange at Highway 69 was constructed as a full freeway interchange in 1995, so as to limit traffic disruption at the junction when the rest of the route is four-laned. The route remains a two-lane roadway at the Long Lake Road interchange — however, the current alignment was built along the future westbound right-of-way, and the original roadbed remains in place for upgrading into the eastbound freeway lanes.

In the Ministry of Transportation's current freeway conversion proposals for the bypass, access will be eliminated to all roads between the junction at Highway 69/Municipal Road 46 and the junction at Municipal Road 55, with the exception of an interchange at Municipal Road 80 (Long Lake Road). The plan has been criticized by Greater Sudbury City Councillor Terry Kett, due to the potential for an increased volume of traffic — particularly trucking traffic from the Walden Industrial Park on Fielding Road — spilling into the Mikkola subdivision.[4]

The final phase of the Highway 400 construction, expected sometime in the 2020s, will see a partial realignment of the current Highway 69 interchange.

Any future freeway conversion of Highway 17 past the existing eastern terminus of the bypass route is expected to take place on a new alignment bypassing Coniston and Wahnapitae.

The following table lists the major junctions along Southwest and Southeast Bypasses, as noted by the Ministry of Transportation of Ontario.[1] The entire route is located in Greater Sudbury. 

km[1]	mi	Destinations	Notes
0.0	0.0	Municipal Road 55	Western terminus of SW bypass, intersecting original Highway 17 alignment. Parclo B4 interchange.
1.9	1.2	Fielding Road / Kantola Road	At-grade intersection. In the current expansion plan, this will become an overpass with no direct access to the freeway.[5]
5.8	3.6	Southview Drive	At-grade intersection. In the current expansion plan, this will become an underpass with no direct access to the freeway.[5]
6.9	4.3	Hannah Lake Road	At-grade intersection. In the current expansion plan, access will be restricted to a new service extension of Treeview Road.[5]
7.8	4.8	Middle Lake Road	At-grade intersection. In the current expansion plan, access will be restricted to a new service extension of Treeview Road.[5]
9.9	6.2	Municipal Road 80 (Long Lake Road)	Parclo B2 interchange with an additional westbound-to-northbound ramp.[6][7]
13.3	8.3	Highway 69 south – Parry Sound, Toronto Municipal Road 46 north	Original eastern terminus of bypass until completion in 1995. Meeting point of SW and SE bypass segments. Parclo A2 interchange, with new directional ramps planned for conversion into a Parclo A4.[5]
24.4	15.2	Municipal Road 55 (The Kingsway)	Eastern terminus of SE bypass. Traffic must turn to remain on Highway 17. Signalized at-grade intersection.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi