Two vehicle collision in Derry now cleared Sorry, we're having problems with our video player at the moment, but are working to fix it as soon as we can Waiting for Video... A road traffic collision involving two vehicles in Derry has been cleared The incident happened on the Foyle Bridge on Monday morning. The collision occurred on Monday morning. Emergency services attended the scene. Traffic is moving normally again. One-way system call as residents ‘can’t cope’ - Colr.