History of King's Highway 417:
King's Highway 417 passes through the heart of the Ottawa Valley, extending from the Ontario-Quebec Boundary to Ottawa and then northeasterly to Arnprior. Highway 417 forms an important link in the Trans-Canada Highway across Eastern Ontario, connecting to Quebec's Autoroute 40 which then continues east to Montreal. Highway 417 is a vital east-west artery through Ottawa, knows as The Queensway. The highway was completed from the Ontario-Quebec Boundary to Highway 7 during the 1970s. Since the mid-1990s, sections of Highway 17 between Highway 7 and Arnprior have been converted into a four-lane highway and renumbered as Highway 417. The most recent highway twinning project was completed through Arnprior in 2012. The Ministry of Transportation intends to extend Highway 417 from Arnprior to Renfrew in the future by twinning the existing two-lane section of Highway 17. Highway 417 is presently approximately 186 km in length. The four-lane divided highway currently terminates about 2 km west of Arnprior. In 2013, construction began on twinning existing Highway 17 from a point 2 km west of Arnprior to about 3 km east of Highway 508. This project is expected to be completed in late 2016, and will extend the length of Highway 417 by approximately 5 km. At the present time, no construction schedule has been announced for the completion of the twinning of Highway 17 to Renfrew.
The entire highway from the Ontario-Quebec Boundary to Ottawa is four lanes, with two lanes provided for each direction of travel. Within Ottawa, the highway ranges from six to eight lanes from Former Highway 17 East (Now Ottawa Road 174) to Highway 416. From Highway 416 to Arnprior, Highway 417 is four lanes. However, a construction project began in 2007 to widen Highway 417 to eight lanes from Eagleson Road in Kanata to Highway 416. An eastbound High-Occupancy Vehicle (HOV) Carpool Lane is also under construction between Kanata and Ottawa. Future HOV Lanes are planned along Highway 417 in Ottawa as the Queensway is reconstructed.
Unless posted otherwise, the speed limit on Highway 417 is 100 km/h (60 mph). On September 26, 2019, a pilot project commenced to test higher speed limits along some sections of Highway 417. Between Ottawa and the Quebec Boundary, sections of Highway 417 have a posted speed limit of 110 km/h (70 mph). There are no Service Centres located along Highway 417, but services are available at several exits. Exits along Highway 417 are numbered from east to west based on their distance from the Ontario-Quebec Boundary. Approximate distances along the highway can therefore be calculated by subtracting one exit number from another. For example, the distance from Highway 34 (Exit #27) to Highway 416 (Exit #131) is 104 km (131 - 27 = 104). Please visit the Highway 417 Mileage Chart page for a list of interchange numbers along Highway 417.
Additional Information About King's Highway 417: