[openrailwaymap] Re: Using pzb and lzb absence for "no train protection"

I would like to add my two cents to this topic. I am starting to realize by going through this email that it appears that Track Authorization (Traffic Control) is completely omitted from OSM. I hope to use the railway tags from OSM/OHM data in a future project. With this in mind here are my comments. 1) The description of railway:train_protection=no is inherently wrong. Train protection is given or accepted by a set of rules either provided by the rule book or the track territory. Now in the case of GCOR (https://en.wikipedia.org/wiki/General_Code_of_Operating_Rules) Rule 6.28 it says "...trains or engines must move at a speed that allows them to stop within half the range of vision short of: Train, Engine, Railroad car, Men or equipment fouling the track, a Stop signal or Derail or switch lined improperly." (6-13 GCOR—Seventh Edition—April 1, 2015) This rule basically says it's a free for all and that it is the responsibility of the train crew to provide the train protection. In the case of Positive Train Control this then becomes an additional responsibility of the computer or system. 2) I am working on my own data set with as many details as possible. Below are the issues of this topic. We have two layers of information to be provided, one is Authorization, Track Authority or permission that is given to a train and we have oversight or digital control. Another thing to consider is that more than two options below could be in effect on any one track.