trailer cars. Frequent breakdowns saw diesel locomotives called in to haul the consist instead. In August 1994, a T class with two MTH carriages were used, but by November 1995, weekday services were being operated by a P class with 2 MTH carriages, with an A class used on weekends with an extra MTH car. On another occasion in November 1995, an X class diesel locomotive in the V/Line Freight livery was used with three MTH carriages. These configurations disappeared after V/Line was separated into passenger and freight divisions. 21st century By the 2000s, the service had settled down, with little change occurring in the 21st century. On a limited number of occasions, V/Line underwent locomotive shortages, with additional trains leased from Freight Australia and later Pacific National appearing on the lines in their green and yellow livery. In 2008, the Stony Point line underwent major re-signalling works including the introduction of three position signalling for the first time on the line. The new signalling system was now controlled remotely by the Frankston Signal Box. On 1 April 2015, passenger services were suspended indefinitely following a series of safety breaches where boom gates failed to drop for an approaching train. After three months of remedial works, passenger services returned to the line on 30 June 2015. Later in April 2008, diesel railcars were again introduced on the line. The rolling stock introduced was Sprinter units originally purchased by V/Line in 1993. Two units usually operate the service, with a single unit returning to Southern Cross for servicing on a regular basis, with another sent in the opposite direction to replace it. The units are selected from the normal V/Line fleet, and are not dedicated to operate the Stony Point service. Locks were installed on toilet doors to prevent their use when in operation with Metro Trains Melbourne. The Stony Point line was the last suburban service in Australia to be operated by a locomotive hauled train. Future Baxter extension In 2013, as part of Public Transport Victoria's Network Development Plan for metropolitan rail, an extension of the Frankston line to Baxter was earmarked to begin in the "long-term", which would equate to at least over the next 20 years. In 2018, the Liberal Party announced a project to extend electrified services to Baxter during the 2018 state election.The project would have included the removal of all crossings between Frankston and