The news that a key highway bridge has collapsed in the US comes as gloomy reading for all in the highway sector. When a section of the Interstate 5 Bridge over the Skagit River in Washington failed in May 2013, a number of vehicles were plunged into the river. Luckily no-one was killed in the incident on the route, which is one of the main links between the US and Canada, and the parallel bridge was able to carry traffic, albeit with delays for users.