The Law Commission Report on Level Crossings. Recommendations for the reform of the law relating to level crossings in Great Britain. Part 5 (pages 155-167) considers rights of way and acess issues in Scotland.
Read the full report: Law Commission lc339_level_crossings.
Press coverage: http://www.scotsman.com/news/transport/build-level-crossings-for-walkers-network-rail-urged-1-3111513
Ramblers Scotland respond: http://www.ramblers.org.uk/scotland/what-we-do/ramblers-position-on/crossing-railway-lines-in-scotland.aspx