On 12 December 2004 the first phase of Bahn2000, an ambitious programme to improve the company's services, was put into effect. The core element was the Zurich-Bern-Basel triangle, where travel times between the cities was reduced to under one hour, resulting in good connections from these stations for most trains. Some connections between cities got two trains in each direction per hour or more, and the S-Bahn services were intensified to four or more trains per hour. Because of these changes 90% of the timetable was changed, 12% more trains were scheduled and travel times generally improved. It was the greatest timetable change since the introduction of the Taktfahrplan.