"The tunnel allowed for the through-routing of commuter trains and eliminated capacity limitations and operational difficulties caused by stub-end terminal designs. This was a first for any U.S. city."

"With their implementation of fast, frequent, and electrified regional rail well underway, Metrolinx and the Toronto region as a whole are not only leading by example but proving to the rest of the continent that regional rail is both feasible and a worthwhile investment. Many North American cities have extensive commuter rail systems that have much in common with pre-expansion GO."

"An estimated 38 per cent of passengers using the Elizabeth line are 'new' — for example, having chosen it instead of not making the journey or as an alternative to travelling by car."

"The RER A has had a significant social impact on Paris and the surrounding region by speeding up trips across central Paris (by making far fewer stops than the Paris Métro) and by bringing far-flung suburbs within easy reach of the city centre."

"After nine years of development, Stockholm's Citybanan train line has opened, expected to double the capacity of the city's commuter infrastructure in a milestone for rail traffic in the capital."

"Described by Swiss Federal Railways as biggest development in the history of the Zürich S-Bahn, the 9.6 km Durchmesserlinie is being built to provide a through route across the city for both local and inter-city trains, eliminating the need for east–west trains to reverse at the Zürich Hauptbahnhof terminus."