Talk:Key:tracktype

non-tracks

Is tracktype only allowed on highway=track. ? Please answer on Key:tracktype -- Nic 16:27, 12 December 2008 (UTC)

I guess, it's hard, given the name to apply it on unclassified or path or anything else than track. Other proposals are on their ways to enhance this one Sletuffe 16:37, 12 December 2008 (UTC)

"Plattenweg" (Rügen)

The problem is: Highways as on the photo are widely used as interconnections between towns/villages/hamlets. So they are both tertiary roads (function) and tracks (quality). -- Smial 09:01, 16 December 2008 (UTC)

I would tag that as highway=tertiary, and then add something about width=* with maybe additions of smoothness=* and surface=* Sletuffe 09:23, 16 December 2008 (UTC)

tracktype is definitely allowed on any form of highway, although obviously it makes sense more on some (e.g. bridleway) than others (motorway)! There are lots of occurrences of tracktype with footway and bridleway in the database, please don't try and redefine this via the wiki. --Richard 10:34, 16 December 2008 (UTC)

Sounds reasonable, thx. .oO(smoothness=axle_breaking..... :-)) -- Smial 13:17, 16 December 2008 (UTC)

No it's not allowed on any form of highway, such as a bridleway or footway. It's for tracks. Tracktype states 2 things. 1. it's a track. 2. the phisical charactoritics of that track. The whole point (which was stated in the original proposal, as well as being accompanied with a diagram) is that it replaces the need for highway=track. If it states thigns about the 'track' we know its a highway=track so that isn't needed. This then frees up the highway key for adding things such as highway=footway with tracktype=grade3. rows and phisical routes can then both be added, rather than the compramise of only putting 'some' data into osm, which in relation to the UK becomes near meaninless. The reason it is still currently used with highway=track is simply because thats what the 2 rendering programs used, not becasue of proposals/discussions/agreements, which is what this should be, and I wish OSM would be all about. pathtype seems to have been used on occasion (looking at tagwatch). Maybe the combining of 2 into 1 is just too hard to grasp in OSM? in which case tracktype may as well be surface=grade1-5 and route=track/path added with it. It would be exactly the same, but just take twice as long to map it..but at least it would stop the same question over and over. Ultimate simplicity rather than any efficiency. Ben 00:57, 27 January 2009 (UTC)

If you look at the original Proposal, it is clearly only intended for tracks. I also noted that many renderers and editors will assume that anything with a tracktype is a track and not evaluate the highway tag in this case. This implies that the authors of those tools believe that tracktype occurs only for tracks which is in agreement with the tracktype proposal.

The English version of this page states nothing about highway, but the German version correctly states that it is only for tracks. --Nop 10:24, 20 August 2009 (UTC)

From the tag statistics for germany at 2010-07-29: grade1, grade3, grade3, grade4, grade5:

.        ways  track   path   foot cycle bridl servic residen steps unclas  ford  road
grade1 179873 168996   1069   1058  1437     2   2107    2361    63   2350     7    71
grade2 206410 199222   1817   1369   666    27   1165    1118    51    572    26    54
grade3 190677 185317   2412    927   202    75    628     525    86    222    29    19
grade4 127257 123000   2644    763    63    86    213     158    60     76    18    11
grade5  96200  91805   3248    650    35    70     72      80    37     34    26     8
Sum    800417 768340  11190   4767  2403   260   4185    4242   297   3254   106   163
of            911076 238601 458375 81760  2639 398567 1159538 59142 200069   306 24043
in %             84%     5%     1%    3%   10%     1%      0%    1%     2%   35%    1%

32047x tracktype at non-tracks, nearly 4% of tracktypes. At bridleways and paths (a lot of paths might be cycleways using path/designated-modell) it is used in a large number.

For practical mapping tracktype is used in a relevant number for non-tracks, too. This use can't be ignored or called as not allowed. A rough classification of possibly mostly ways outside residential areas seems to be necessary for a lot of mappers. --Mueck 11:45, 8 August 2010 (BST)

In the UK a footway is a right to tread foot..on that way! So a track is a footway. so Tracktype=grade1 highway=footway is normal, and the whole point of this tag. Physically however a footway is not a track. So unless it's a legal right it's a contradiction, and therefore it can be called as not allowed, just as me saying highway=footway footway=no isn't allowed, becuase it's a contradiction. It's not allowed by 'logic'..not by OSM. In most countries footways are just paths. The tag has a different usage, and this isn't an issue, but...tracktype does then clash with it, becuase they are 2 contradicting physical descriptions...and NOT 1 physical and 1 access description as in the UK. Ben 01:18, 5 October 2010 (BST)

I see sometimes highway=cycleway in combination with cycleway=track and tracktype. Not correct, see Do not use cycleway=track + highway=cycleway and Osmose reports this as issue, see [1] Emvee 12:39, 26 October 2019 (UTC)

cycleway=track is what makes it wrong. highway=cycleway + tracktype=* is fine. --- Kovposch (talk) 04:19, 28 March 2022 (UTC)

How to tag mixed tracks?

Betonstreifen

How do you tag a track where the tracks themselves are built with concrete, tarmac or pavement but the center is of a softer quality? I always tag them as grade1 by the hard material you drive on, but it seems there are other philosophies. --Nop 10:20, 20 August 2009 (UTC)

grade 1. Can't be anything else and not contradict the descriptions. Ben 13:54, 6 January 2010 (UTC)

A track was built originally for 4 wheeled vehicles and only where the wheels roll is relevant. Nobody will drive/ride on the center, by essence it was not meant to, somewhat comparable to the side of the track actually, unless exception when the main track is very degraded, like a muddy grade5 track.

So on the case of the photo's concrete lanes with soft center, it's a grade1. But other cases of mixed material are rather grade2 because the wheels will encounter unavoidably and alternately hard/soft material. For example, a track made with grass pavers. --SHARCRASH (talk) 14:51, 6 May 2021 (UTC)

None of the above. surface=concrete:lanes. --- Kovposch (talk) 04:18, 28 March 2022 (UTC)

Classification of 'heavily compacted hardcore'

Today a track wirh a surface of 'heavily compacted hardcore' is classified as 'grade1'. Tracks with 'grade2' have a surface of gravel, which can also be heavily compacted. Then a heavily compacted gravel means 'grade1' and a loosely compacted gravel means 'grade2'? I think this difference is very difficult to determine. I suggest to remove the terminus 'heavily compacted hardcore' from 'grade1' and replace it with 'smooth surface' or something like that. --Rudolf 07:03, 12 July 2012 (BST)

I changed to the term 'sealed'. --Hb 12:17, 15 July 2018 (UTC)

Increasing flexibility

Hi, I am interested in some feed back from people who consider they have some "ownership" of the tracktype tag. There has been some discussion in the Australian mailing list about how to deal with 4x4 tracks and even rougher roads. Prompted, to some degree by the excellent routing software now appearing and using OSM. Potential for some nasty situations exist. http://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines actually says that tracktype is not suited to Australian conditions, I am not so sure and think it could be easily extended to meet our needs as well.

So, if you have an interest in tracktype, and may well have a watch set on this page, would you support the following -

1. extending the existing five grades, adding grade6 and grade7 (or better still, 4wd_recommended and 4wd_only) to cover more extreme roads than tracktype currently addresses. At present the preferred way to render such a tag would be by appending, eg, "(4x4 only)" to the road name. This is consistent with how many maps are printed and is familiar to map users.
2. encouraging render engines to understand that tracktype applies to roads other than highway=track. In Australia, and many other parts of the world, there are quite important roads, connection population centers that need to be marked in a way to warn (eg) visitors to the region that they are not suitable for a conventional car. The highway= tag tells us the purpose of a road, tracktype needs to warn us about its likely condition.
3. Important ! Encourage people making routing engines to tread very carefully when sending unsuspecting motorists down every road in OSM.

Its worth noting that these matters really do potentially have life threatening aspects. Sadley this has been proven on many occasions and no one wants OSM mentioned in that sort of context.

--Davo 02:44, 28 October 2012 (UTC)

Sadly, noting no response to this message we have decided on a somewhat simpler and weaker solution. Suggest people mapping 4x4 tracks consider marking them as grade6, grade7 or grade8 (ie 4x4 recommended, 4x4 required, extreme 4x4). Maybe, if this becomes more widely used, we can formalize it. I will make a brief suggestion to that effect on the tracktype page if I hear no objections. --Davo 05:02, 29 December 2012 (UTC)

Tracktype has been about the "softness" or "builtness" of the material, not about usability, even if there's a loose correlation between the two - for some road vehicles. Alv 09:05, 29 December 2012 (UTC)

Thanks Alv, good to know someone is watching ! The main page says "Tracktype is a measure of how well-maintained a track or other minor road is", thats actually the most important information for someone considering using a particular road or a renderer considering sending some poor unsuspecting soul down it. There would be a pretty tight correlation between 'maintained' and 'usability' IMHO. Not perfect I agree but best we have. Especially important in those parts of the world where there are a lot of roads like we are talking about. --Davo 01:09, 2 January 2013 (UTC)

The Israelis are using tracktype - but with their own definitions .. tracktype=grade5 for high ground clearance and diff locks https://wiki.openstreetmap.org/wiki/WikiProject_Israel#Ways_Belonging_to_a_Trail The quality of 'builtiness' has a direct effect on the usability. ....

Rendering when its not a track

I note someone has removed referance to renders only observing this tag on tracks. The referance used to point out that is not the intention of this tag, it can be applied to any (minor ?) road AND should be so rendered. The fact that the OSM 'official' render does not use this tag on important roads is a serious omission and no amount of editing history will hide that fact. I raise this point because badly rendered maps put lives at risk. I can demonstrate many cases of people dying in the Australian Outback because they were using poor maps. Fortunatly, so far, an OSM map has not been so involved.

This may not be an issue in Western Europe or North America but the world is a bigger place than that. I will put that referance back if no one objects.

--Davo (talk) 05:31, 31 December 2013 (UTC)

Following some prompting on the mailing list, I have put back the note about rendering on other than tracks.

--Davo (talk) 22:49, 19 March 2014 (UTC)

Surface from taginfo today

Just a quick manual summary about grades and surfaces: (above 1%)

grade1	asphalt 12%, paved 12%, concrete 3%, ground 1%, ...
grade2	gravel 19%, unpaved 7%, ground 4%, compacted 1.5%, paved 1%, ...
grade3	ground 11%, gravel 8%, unpaved 2%, grass 1%, dirt 1%, sand 1%, ...
grade4	ground 13%, grass 10%, dirt 3%, gravel 2%, unpaved 1%, sand 1%, ...
grade5	grass 17%, ground 8%, unpaved 4%, dirt 2%, sand 1%, ...

Possibly it means "what happens to the road after a heavy rain or vehicle. Maybe. --grin ✎ 13:01, 21 July 2014 (UTC)

The page at one point was edited to say "Almost always unpaved..." for grades 2 to 5 instead of just "Unpaved". I think we should simply use "paved" for grade 1 and "unpaved" for grades 2 to 5 to match usage and simplify the text. --Jeisenbe (talk) 05:18, 7 July 2019 (UTC)

Note that grass paver is considered as paved by some and as unpaved by others. There are also some roads made of fragmented, overgrown and crumbling asphalt, some of them qualifying for grade2 rather than grade1 Mateusz Konieczny (talk) 19:43, 7 July 2019 (UTC)

Dirt roads in arid mountains

High quality dirt road (Israel)

On Crete tracks are "created" by bulldozers. If they do a good job, they crunch the stones, driving several times for and back. For an impression see here. Some may be usable by normal car, but most only by trucks (pickups, 4WD). The better ones are used several times a day und thus smoothened by use. During rain they may be damaged by erosion and have to be repaired (filled with gravel), the more important ones first of course. I guess its the same everywhere in remote Mediterranean areas.

Currently in OSM all tracktypes from grade2 to grade4 are used for these tracks. From a practical point of view I would use 3 (for the better ones) or 4 (the awful ones, trucks only), but grade2 IMHO is ridiculous. Any opinions? --GerdHH (talk) 09:19, 13 April 2016 (UTC)

I would use grade2 for high quality surface=compacted. It is a it tricky to do this basing solely on a single photo, but https://upload.wikimedia.org/wikipedia/commons/f/f7/Naftali_Mountains_Scenic_Road_2.JPG looks like something that may be high quality compacted road qualifying for grade2. Do you have an image of a similar road after rain? Mateusz Konieczny (talk) 11:41, 1 December 2019 (UTC)

Bulldozed gravel road

Here is photo of a rather simple road. After checking my photo collection I must admit that even the most rough gravel roads look a bit smoothened. A video of a machine producing a high-end road, made of rough stones on the base and fine gravel as finish on top, is shown on the website of seppi. Wikipedia describes the process of gravel road construction on their pages Bulldozer (rough, tracktype=grade4?) and Grader (fine, tracktype=grade3?). The rough ones are more erosion prone than the fines ones, but unfortunatley I never took a photo of such damages. IMHO tracktype=grade2 should be reserved for Macadam surfaces only.--GerdHH (talk) 09:08, 29 March 2022 (UTC)

not verifyable

See the arguments presented here http://blog.imagico.de/verifiability-and-the-wikipediarization-of-openstreetmap/ --PangoSE (talk) 08:21, 27 March 2020 (UTC)

Interesting blog, thank you. Do you have alternatives to offer for the tracktype tag? I have been advised by Graphopper to use it on my edits to Grass Hill as a result of this note: https://www.openstreetmap.org/note/2674954 (Graphopper's comments came in after I closed the note).

I note your saying that usefulness is not a suitable criterion for information in the map. I hear you. At the same time there is clearly a huge need for the information that tracktype attempts to convey, because routing is so big a part of how the database is now used (and just the sort of use that was intended ab initio, I imagine).

I assume the solution is more fine-grained tags for physical properties? Ideas I've had: "surface=rutted", "friability=high", etc.

What are your suggestions? eteb3 (talk) 08:57, 24 August 2022 (UTC)

Opening sentence

The opening sentence currently states that Tracktype is a measure of how well-maintained a track or other road is, particularly regarding surface firmness. The maintenance aspect is mentioned for grade2 (heavily degraded and crumbled roads) and grade5 (unimproved track), in both cases as a secondary aspect after surface firmness. Recent forum polls amid extensive discussions suggest that surface firmness is the main aspect:

• Poll 1 (46 voters): 82% use this tag for firmness
• Poll 2 (21 voters): mostly firmness outpolled mostly state of development 2:1, but the main outcome was it's complicated
• Poll 3 (9 voters): 66% said map editor presets refer to firmness

So, I propose reordering the significance of these correlated aspects by rewriting the opening sentence like this: Tracktype is mainly a measure of surface firmness of a track or other road, which in many regions also reflects how well-maintained it is. --Fernando Trebien (talk) 12:39, 19 February 2026 (UTC)

We already have a key for surface=*, which implies a corresponding firmness. Does it make sense to have two tags that both primarily describe the surface and its firmness, but no longer have a tag that primarily describes the degree of maintenance? --Hufkratzer (talk) 19:45, 19 February 2026 (UTC)

I'm worried if we accept that 76 voters can redefine (even slightly) a tag definition used 10 Million times on the course of 20 years. However bad or unprecise this tag might be, it has been used and known by this definition. I'd suggest those who really want to tag tracks's firmness to define and use a new firmess=whatever tag. sly (talk) 13:45, 20 February 2026 (UTC)

I just stumbled across this related forum discussion: https://community.openstreetmap.org/t/rfc-new-key-firmness/141407 --Hufkratzer (talk) 21:54, 22 February 2026 (UTC)

In fact, the article remained essentially stable for over 10 years, and about 2/3 of the uses of tracktype=* were mapped during that period. However, the article does not define what "maintenance" is, and the participants in the linked forum threads also offered no explanation of what it means to them. What indicators are mappers using to assess it? If we have 5 levels of maintenance, what is "high" maintenance? What is "medium-high" maintenance? What is "medium-low" maintenance? These are not defined in the article nor in the discussions. On the other hand, throughout this period, "surface firmness" has been better defined, exemplified, and explained in terms of material composition. --Fernando Trebien (talk) 01:36, 23 February 2026 (UTC)

5 years ago on Tag:highway=track the description for tracktype was changed from "can be used for the maintenance intensity and surface firmness" to "specifies roadway firmness" (based on a mailing list discussion that did not discuss tracktype=*, maybe @Ezekielf: wants to explain it). Therefore currently the wiki is contradictory and confusing and I appreciate that you are trying to make it less contradictory and confusing again. OTOH I often found surface=* more complicated to apply than tracktype=* because tracks often have mixed surfaces; it is also less used in cobination with track, see taginfo. If you redefine tracktype to firmness, then I fear that it will become at least as difficult to apply as surface=*. --Hufkratzer (talk) 15:03, 1 March 2026 (UTC)

Thank you for pointing this out, @Hufkratzer:. I have changed the description of tracktype on the highway=track page to match the infobox on the tracktype page: https://wiki.openstreetmap.org/w/index.php?title=Tag%3Ahighway%3Dtrack&diff=2960156&oldid=2960148. I'm disappointed in myself for having made this error five years ago. The reason it happened is because at the time there was significant controversy around all highway=track being described as "unmaintained". A major goal of that page rewrite was to remove mentions of maintenance because a road's level of maintenance is not a good reason to choose highway=track as the primary tag. On this line, removing the mention of maintenance left tracktype described only as specifying firmness. I should have foreseen the misunderstanding this could cause. It was an unintentional oversight in a much larger rewrite of the whole page. --Ezekielf (talk) 15:35, 3 March 2026 (UTC)

Well, the word "maintenance" was added to the article of highway=track by @Dieterdreist: in April 2019, but it could have just been taken from the introduction of the article of tracktype=* where it was never defined. --Fernando Trebien (talk) 17:19, 5 March 2026 (UTC)

Does “firmness” refer to the surface layer or the road structure?

It is unclear whether the grading refers only to the surface material or to the overall load-bearing structure of the road. --julcnx (talk) 10:36, 9 March 2026 (UTC)

Firmness refers primarily to the observable surface layer: the material vehicles actually contact. This is what mappers can verify through direct observation or probing during survey. Subsurface load-bearing structure, while it may influence surface firmness, is typically invisible and therefore not practical for mappers to assess consistently. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

How are maintenance and firmness related in the grading scheme?

The introduction links tracktype to maintenance but the value definitions focus on material composition and firmness, without explaining how maintenance affects the grade. --julcnx (talk) 10:36, 9 March 2026 (UTC)

Maintenance should be either defined (because it never was) or removed from the article. At best, it can currently only be understood as a factor that often correlates with firmness. However, naturally firm soils (rocky, sandy, arid climates) can offer firmness with minimal or no maintenance.--Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

How should grade3, grade4, and grade5 be distinguished in the field?

The descriptions (“even mixture”, “mostly soft”, “soft”) are vague and lack observable field criteria, making consistent mapping difficult. --julcnx (talk) 10:36, 9 March 2026 (UTC)

What observable indicators should mappers use to determine a grade?

The page provides no field indicators such as compaction, drainage, rut depth, or grading that would help distinguish between grades. --julcnx (talk) 10:36, 9 March 2026 (UTC)

Do wheel tracks or the entire road surface determine the grade?

The example images emphasize wheel tracks and center strips, but the text does not explain whether grading should consider only the wheel contact surfaces or the full road width. --julcnx (talk) 10:36, 9 March 2026 (UTC)

I think that the contact patch of the wheels (with some room for movement) is paramount, as it is most directly related to safety risks. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

What role does the center strip play in grading?

The illustrations show grass or soil center strips as a visual difference between grades, but this feature is not discussed in the written definitions. --julcnx (talk) 10:36, 9 March 2026 (UTC)

When does a degraded paved road stop being grade1?

The wiki says grade2 may apply to degraded paved roads, but it does not explain when a paved surface should no longer be considered grade1. --julcnx (talk) 10:36, 9 March 2026 (UTC)

When it is no longer possible to travel continuously over a paved surface, even with minor maneuvering around exposed underlying base material (gravel, dirt). --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

One thing that still seems inconsistent is how degradation is treated. A paved road that deteriorates may drop from grade1 to grade2, even though the surface material is still asphalt. But similar degradation on an unpaved track (erosion, deep ruts, poor compaction) is usually considered a smoothness issue rather than a change in tracktype. In practice both situations affect firmness and usability. It would be useful to clarify why degradation affects tracktype for paved surfaces but not for unpaved ones. --julcnx (talk) 06:17, 10 March 2026 (UTC)

How should seasonal variation affect grading?

In many regions track firmness changes significantly between dry and wet seasons, but the wiki does not clarify whether grading should represent typical, best, or worst conditions. --julcnx (talk) 10:36, 9 March 2026 (UTC)

I would prefer a static map to represent typical conditions under normal climatic conditions and use an extra tag for the worst conditions (e.g. tracktype:seasonal=* for seasonal variation, tracktype:conditional=... @ wet for conditions during/after rain). If there is no clearly dominant condition (no condition applying to more than 60% of the time), I would lean toward representing a worse condition with the main tag. A cleverly designed app can display the combination of those tags together, providing the map user with both warnings and realistic expectations. Note that surface=* often implies changes after rain or when frozen, without need to explicitly restate the typical variation under different conditions, and as such it is a richer tag than tracktype=*. For example, for surface=clay, it shouldn't be necessary to add tracktype:conditional=grade5 @ wet as this is already known for most clay soils. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

How does `tracktype=*` relate to `smoothness=*`?

Both tags provide information about road condition and usability for vehicles, but their relationship and intended separation are not clearly explained. --julcnx (talk) 10:36, 9 March 2026 (UTC)

These tags capture different dimensions. tracktype=* has been described for many years, in the wiki and in map editor presets (reaching more new and casual mappers), as surface firmness and composition, implying the likelihood of sinking, getting stuck, or losing traction. Firmness in this case refers to the surface's shear strength and bearing capacity (see Soil mechanics). smoothness=* is mainly for surface shape, bumps, ruts, and minor obstacles that affect comfort, stability and require vehicle clearance. A track can be firm but rough (rock outcrop: tracktype=grade1, smoothness=horrible) or soft but smooth (fine sand: tracktype=grade5, smoothness=good in the sense of no obstacles, though difficult to traverse). Both tags provide valuable routing information. Certain surface=* types tend to deform easily and certain other surfaces have the opposite tendency, so the two characteristics are correlated but still conceptually orthogonal. Hence, surface=* alone adds more information than either tracktype=* or smoothness=* and often more than the two combined. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

Why do the example images show rutting and vegetation differences not mentioned in the text?

The illustrations imply differences based on rut depth, vegetation, and maintenance, but these factors are not part of the written grade definitions. --julcnx (talk) 10:36, 9 March 2026 (UTC)

Maintenance is still not defined, so I don't know what exactly you are seeing in the images. Could it be related to keeping vegetation to a minimum? Rut depth illustrates a consequence of surface type and firmness and might me mentioned as such. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

What dimension are the grades intended to represent?

The page mixes maintenance, firmness, material composition, and road quality/usability without clearly defining which dimension the grading scheme is meant to represent. --julcnx (talk) 10:36, 9 March 2026 (UTC)

The descriptions of values have been, for a long time, clearly focused mainly on surface=* type (material composition and structure) and firmness. Both partially represent usability. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

Thanks, that helps clarify the intent. However, if firmness mostly derives from the surface material and structure, it makes the statement in the article a bit unclear: “the same surface material can exhibit various degrees of firmness”. If that is the case, it would probably help the wiki to explain what observable factors cause those differences in firmness in the field (e.g. compaction, grading, traffic wear, etc.), otherwise it remains difficult for mappers to consistently distinguish grades. --julcnx (talk) 06:14, 10 March 2026 (UTC)

The article should certainly mention objective criteria on how to assess firmness more consistently, preferably with example photos. Some were mentioned previously, like tire marks, ruts and vegetation. Perhaps they were silently removed because they were not well explained and caused more confusion than helped. For example, a track might have overgrown vegetation one day, but a few days later it undergoes maintenance and becomes clear, or perhaps tire tracks seen one day are erased by rain overnight. Those conducting surveys will reach very different conclusions at different times if the article does not explain how to carefully interpret these cues. --Fernando Trebien (talk) 11:57, 10 March 2026 (UTC)

Should the wiki provide guidance on how data consumers should interpret each grade?

The wiki describes tracktype as useful for "road quality" but gives no guidance on how routing engines, renderers, or navigation applications should treat each grade — for example, at which grade a standard car router should avoid a track, or how grades should influence rendering. Without this, data consumers must interpret the scale independently, leading to inconsistent behaviour across applications. --julcnx (talk) 10:36, 9 March 2026 (UTC)

Definitely. Here is a summary of what many of them do already (there's a mention of how BRouter operates further down that thread). I think the wiki should document observed practices and suggest that:

• grade1-grade2: Generally passable by normal passenger vehicles
• grade3: May require caution or robust vehicle depending on surface=* type
• grade4-grade5: High clearance or off-road capability (e.g. 4wd_only=*) often needed

The wiki should say that data consumers should also consider surface=* and smoothness=* tags alongside tracktype=* for best routing decisions, as tracktype=* alone provides incomplete information about usability. --Fernando Trebien (talk) 14:57, 9 March 2026 (UTC)

Why does grade1 effectively correspond to paved roads?

The wiki describes tracktype as a measure of firmness, yet in practice grade1 appears to apply almost exclusively to paved tracks. It is unclear why a very firm unpaved track (for example with surface=compacted or well-compacted gravel) could not also qualify as grade1, especially if the scale is meant to describe firmness rather than material. In both cases the road may be easily passable by standard vehicles, with surface=* providing the material detail. --julcnx (talk) 06:21, 10 March 2026 (UTC)

surface=compacted degrades much more easily than the main paved surfaces like surface=asphalt due to the use of a weaker binding agent, I think that's the main reason for separating grade1 from grade2. Not all paved surface=* values are typically grade1 though: we've seen in the data that surface=wood and surface=grass_paver are probably closer to grade2 on average; grade1 is still the most common value for both though, but only by a very small margin for surface=grass_paver. --Fernando Trebien (talk) 14:49, 10 March 2026 (UTC)