Changelog (ITRS Bike)

Some minor tweaks and additions.

Wilderness – new Natural Hazards subfactor. In addition to the existing 4 subfactors (Mobile reception, evacuation/rescue options, water supply and wildlife) an additional subfactor was added: Natural Hazards. Here it is rated how much preparation is required to account for potentially difficult river crossing, passing through zones with probable rock falls, or through restricted areas for which specialized guides are mandatory.
Updated definition of jumps
Updates for green trails that now allow certain types of TTFs and added minimum length of TTF of type High-Wide
We’ve added example images of trail surface
Updated values for wallrides between black and orange
The general definition page of obstacles was refined, making a stronger link to the required riding skills
The general definition page of drops was refined, addressing the effect if a drop is built rollable, or the landing is narrower than the take-off
Minor tweaks in the signage examples to be easier to read for color blind
Some tweaks to the Guidelines for Trailbuilders section

Major release this time, we’ve added many tweaks here and there and most notably added more guidelines for signage.

Improved goals and guiding principles page to better explain the goals of ITRS
New page to better explain the ITRS Terminology and building blocks to align with the ITRS Trail Rating app
Expanded ITRS approximate comparison with other trail rating systems
Added reading examples of ITRS based terrain signage
Added ITF (Intrinsic Trail Features) and TTF (Technical Trail Features) page to better explain ITRS Terminology and building blocks to align with the ITRS Trail Rating app
Added in depth explanation for the technical specification (now with drawings)
Added Wallrides rating guidelines in the Technical Difficulty chart
Minor tweaks to some values in the Technical Difficulty chart
Added guidelines for trail signage with examples of suggested usage with minimalistic and complete versions
Added guidelines to provide whole trail technical ratings (with shares of technical difficulty in percent of the trail length)
Updated the possible signage archetypes
Updated route signage guidelines with more examples
Updated graphics package
The Nutshell now also includes Spanish

Refined logic to determine the overall technical difficulty rating of a route: The percentage of a route that can be of higher technical difficulty than given in the ITRS route pie was increased to 5%, but none of the harder trail segments can be longer than 500 m.
Adaptations and refinements in trail specification of technical difficulty (surface types, maximum grade, average grade, corner radii, terminology for trail width, ). All in a way that previous ratings would not get harder, but in future could in some cases be rated easier.
Refined definition of water supply ratings within wilderness factor to be more objective
Updated description of rescue options ratings within wilderness factor to be more objective
Included dangerous plants under dangerous wildlife within wilderness factor
Norway and Australia added to the system comparison
Correction of typos
Updated endurance level calculator: It now shows how close the route is to the next higher level to support a manual judgment if one should rate the route higher in case, e.g., the climbs are not on a road but on technical trails.
ITRS-Nutshell: Correction of typos in French version

Added a fifth level in the Endurance factor,
better clarified relationship between Endurance factor and E-Bikes,
tweaked some values in the ITRS technical difficulty Technical specification of the difficulty levels chart,
refined the short description of tech levels for bikers & added trail examples,
added a reading example of the ITRS “route pie”,
added trail structure terminology page,
revised endurance formula for the addition of 5th level,
added clarifications and important comments on exposure ratings,
added important considerations for rating the wilderness factor,
introduced a wording to differentiate with in one tech level,
added page to better explain possible signage archetypes,
added example of ITRS Implementation in the Lake Garda area in Trentino (Italy) designed by Max2 GmbH,
updated ITRS Team contacts,
updated the acknowledgements page,
correction of typos.

Added color blind feature in pie chart visualisation,
tweaked some values in the ITRS technical difficulty Technical specification of the difficulty levels chart,
added translations in French, German & Italian of key ITRS aspects,
updated the “Goals & guiding principles of the ITRS”,
correction of typos,
updated the acknowledgements page.

This was the first public release of ITRS.