The line was originally dual track at Penryn.
Evidence of the dual track can be seen at Penryn station, where two platforms are still visible.
The Beeching Report in the 1960s instigated the reduction of the line there from two to one.
In 2004 a proposal was put forward to reinstate a passing loop into the line, to allow for a doubling of service frequency.
 Funding was agreed with £4.67 million coming from European Union funds, £2.5 million from Cornwall Council, and £600,000 from Network Rail.
 The new 400-metre (440 yd) loop was installed over two long weekends in October 2008 and work on the platform extension was also started.
 The loop was brought into use ahead of schedule and to budget, with the formal opening by Kevin Lavery, the Chief Executive of Cornwall Council, taking place at Penryn station on 18 May 2009.
 Works included a new car park and waiting shelter at Penryn, in addition to the new loop, signalling and platform lengthening.
The line was originally dual track at Penryn. Evidence of the dual track can be seen at Penryn station, where two platforms are still visible. The Beeching Report in the 1960s instigated the reduction of the line there from two to one. In 2004 a proposal was put forward to reinstate a passing loop into the line, to allow for a doubling of service frequency.  Funding was agreed with £4.67 million coming from European Union funds, £2.5 million from Cornwall Council, and £600,000 from Network Rail.  The new 400-metre (440 yd) loop was installed over two long weekends in October 2008 and work on the platform extension was also started.  The loop was brought into use ahead of schedule and to budget, with the formal opening by Kevin Lavery, the Chief Executive of Cornwall Council, taking place at Penryn station on 18 May 2009.  Works included a new car park and waiting shelter at Penryn, in addition to the new loop, signalling and platform lengthening.
Maritime Line