|高速道路||H||highway=trunk||Highways which have heavy traffic intensity and connect different cities, regions and tourist centers.
Example includes the primary highways: Mahendra Highway, Tribhuvan Highway, Arniko Highway, Siddhartha Highway, Prithvi Highway
These are the small roads usually in villages that provide access to abutting (lie adjacent to) land with no movement. Usually they they give access to one or more villages to the District Headquarters.
The following roads forms the road network in urban areas like cities and towns. Sections of these roads carrying very high density are usually oneway (oneway=yes) and intersections are restricted by having a parallel highway=service road to collect local traffic. Major intersections are usually grade seperated or are regulated using highway=traffic_signals. For all practical purpose the roads in an urban area can be considered as those roads that are enclosed within designated ring roads or bypass roads.
|Primary Collector or Sub-arterial Roads||highway=primary||Road corridors that carries a huge volume of traffic between arterial roads and has a high density of public transport services. e.g. Maitighar to New Baneshwor, Tripureshwor to Kalimati, Thapathali to Jawlakhel etc. These roads often connect two relatively distant localities in urban areas. The lanes=* key should be used to specify the total number of traffic lanes.|
|Secondary Collector Roads||highway=secondary||Collector roads that carry lower volume of traffic and has either no public transport service or a lower density of public transport service. e.g. New Road to Basantapur, Mangalbazaar to Gwarko, New Baneshwor to Sankhamul, etc. These roads often connect two neighboring/nearby localities in urban areas. The lanes=* key should be used to specify the total number of traffic lanes.
NOTE: This roads are often named as a सडक, e.g. बत्तीसपुतली सडक.
The following roads cater to local traffic movement over short distances and feed traffic into bigger roads. Speed is usually restricted due to narrow widths, high number of intersections or by traffic calming devices like traffic_calming=bump. Access restrictions can be indicated by using the access=* tag.
|Unknown or unverified road||highway=road||Roads traced from satellite imagery for which a classification has not been determined yet. This is a temporary tag indicating further ground survey work is required.|
|Residential road||highway=residential||General residential roads in a planned locality. Wide enough to carry slow moving residential traffic. Wider residential roads with access to two cars at the same time will have lanes=2 key. Narrower residential roads through which only one car can pass at a time will have lanes=1 key.
NOTE: A road name ending with the word "मार्ग" is a good indication that a road is residential.
|Service ways||highway=service||Generally for access to (or inside) a building, industrial estate, universities, parks, etc. This is also commonly used for access to parking, driveways, and alleys.|
|Pedestrian||highway=pedestrian||Roads that are almost exclusively used by pedestrians and are out of bounds of motor vehicles in normal conditions, such as plazas and squares. e.g. Roads around Durbar squares, Ason etc. If motorcycles are allowed, it will be tagged motorcycle=yes.|
|Unpaved motorable tracks||highway=track
|Rough roads, often with unpaved/unsealed surfaces and normally for agricultural or forestry uses etc. Also used for unpaved roads in rural areas through which motorized vehicles such as tractors can pass. Use tracktype=* for tagging to describe the surface.|
|Footpaths||highway=footway||Paths designated for pedestrian use in residential areas. Should be used along with galli=yes for narrow 'galli' which cannot be accesed by vehicles (a taxi or bigger). Most of the time, a bicycle or a motorcycle will regularly pass through these streets, but they will still be called galli. For wider pedestrian roads, please use highway=pedestrian.|
|Multi-use paths||highway=path||'Kachcha' tracks or dirt paths not intended for motorized vehicles. Also used by stock/mules/yaks and suitable for mountain biking and hiking along with sac_scale=*|
ネパールには4輪車の通行がむずかしいかできない道路が多くある。それらの区間で一番大きな車両はオートバイである。 Although a path may be clear on the imagery, it is often difficult to establish for certain whether it is used by vehicles with axles or not. However, it is important to try, as such information is highly useful for on-going humanitarian relief efforts.
Determining a path's highway type from imagery
The following rules of thumb can be used to decide whether a path can be used by 4-wheeled vehicles:
- Examine the path for changes in direction. Frequent 'kick-backs' indicate a pedestrian path.
- Examine the path for alternative paths. Pedestrian paths will often have many small divergent paths in places which get muddy or are liable to erosion. Similar places with vehicular traffic do not show clear divergent paths, but rather broaden out.
- Tracks and gravel roads will often show clear signs of the presence of 4-wheeled vehicles.
- Consider access. All highways upstream of a foot suspension bridge are very likely to be paths for pedestrians.
- Gradient. Estimate gradient of highways. OpenCycleMap will help. A gradient over 7% is unlikely to be a road regularly used by vehicles.
- River and stream crossings. The way in which a highway crosses rivers and streams can often provide useful cues as to the type of traffic using the highway. Pedestrian routes tend to try and avoid height loss so will contour upstream, whereas powered vehicles need a steady gradient and broad crossing place.
Tagging rural vehicular highways
In practice highway=unclassified is usually the best choice. Villagers in rural areas of a poor country are unlikely to be able to afford motor vehicles, and thus the primary functions of the roads are access from the main road network. Longer roads serving several villages may need a highway=tertiary to reflect a more important position in the road network. But often the initial tagging can only be refined once the rest of the highway network has been traced for context.
Sometimes highway=track is used, but in Nepal's classification scheme, it is typically used for agricultural roads. highway=road is sometimes used in OSM to indicate that more data are needed to correctly classify the road, but this is not appropriate when the data is likely to be needed in the short term, as in current 2015 Earthquake.
It is also important to tag unpaved roads as surface=unpaved and to identify river and stream crossings and mark these ford=yes, either as a node intersecting the waterway or as a section of the highway that crosses the waterway.