How do Emergency Detour Routes signs work?

Emergency Detour Routes (EDR) are permanent detours marked by orange signs that help guide residents throughout the city of Ottawa in the event that Highways 417 and 416 and Ottawa Road 174 need to be shut down due to an incident.

EDRs will lead motorists through Ottawa arterial roadways in an efficient way and are designed to:

- keep traffic moving;
- aid drivers who are unfamiliar with Ottawa roads; and,
- prevent heavy trucks from using inappropriate streets.

For more information visit the Emergency Detour Routes webpage.