1997, the Planning Act was passed, which incorporated a plan for the construction of a new line between Copenhagen and Ringsted. Furthermore, the act provided three different solutions for the project; these involved either the expansion of the existing tracks via the construction of a pair of new tracks alongside the existing lines or construction of two tracks along a new alignment between Copenhagen and Ringsted via Køge, which included an option for building a new station at Køge. A combination of both expansion and new construction were also considered. During March 1999, these proposed solutions were rejected, thus efforts were made to refine these proposals ahead of another review. International consultancy firm NIRAS was involved in the production of preliminary design and project propositions. According to official documentation published during 2005, the projected time for the line's completion was eight years from its authorisation, of which construction will take five years. Reportedly, the Copenhagen–Ringsted Line was estimated to incur a one-time cost of $1.83 billion to complete. Selection and approval During March 2007, following a review of the studied options, the Danish parliament decided to restrict further research activity to two of the potential solutions, the so-called 'greenfield solution' and the 'fifth-track solution'. In late 2009, the fifth-track solution was officially rejected, although it was projected that this option would have been cheaper. During May 2010, the greenfield solution for the line received approval from the Danish Parliament in the form of the Construction Act. The greenfield solution's aim is the diversion of all trains which do not service local destinations between Copenhagen and Roskilde or between Roskilde and Ringsted, onto a newly built line, which later became known as the Copenhagen–Ringsted Line. By building the Copenhagen–Ringsted Line, it was anticipated that local traffic could then be expanded on the existing railway, while those trains which traveled on the new line would benefit from reduced travel times between Copenhagen and Køge, where a new station will be constructed at Køge North, to be reduced by 15 minutes. In total, a 60km section of new dual-track electrified railway, capable of handling speeds of up to 250km/h for passenger trains, is to be built; reportedly, this undertaking would be the largest rail programme to ever be performed by national railway infrastructure agency Banedanmark. The decision to construct a new high speed railway line that it led to the forming of an