passengers find the least crowded carriage when boarding a train and should reduce dwell times at stations. If the trial is successful, it will be rolled out across the London Overground network. See also Overground Network Orbirail Tramlink London Buses East London Transit Cycling in London Urban rail in the United Kingdom References Further reading Asher, Wayne (2015). A Very Political Railway – the rescue of the North London Line. Glover, John (2013). London's Overground. External links London Rail 2007 establishments in England 2007 in London Croydon 2020 Electric railways in the United Kingdom Overground Rail infrastructure in London Railway operators in London Urban ring railways