This page will contain information relative to safety articles I have found interesting.  Watch for future additions. Federal Railroad Administration: Rules, Standards and Instructions Part 236 subpart H (Standards for Development and Use of Processor-Based Signal and Train Control Systems) Federal Railroad Administration: Correction to Part 236H Part 236 and AREMA Manual Part (17) - Presentation by Jim Hoelscher at 2005 Rule Interpretation Meeting. The following articles are not the most recent, but I find them to be extremely helpful in understanding some of the basic issues, rather than relying on magic tools or processes to "make everything alright". Complex Sofware: Unsafe at any Level, by Michael Lutz Evaluation of Safety-Critical Software, by David Parnas, et al. Error-Free Software Remains Extremely Elusive, by Robert L Glass What Do You Mean It's Failsafe? Parts 1 and 2 by David Rutherford The Risks of Software, by Bev Littlewood, et al Software Safety: Why, What and How, by Nancy Leveson See also Publications Section of this website for additional material.