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Please keep this page in English, so non-Romanian mappers can be later referenced to it.

This page refers to the usage of highway='trunk' on external roads (i.e. outside of cities/towns/villages/hamlets). Using trunk inside inhabited areas is highly discouraged.

Using the 'trunk' value in Romania's roads in OSM proved to be a difficult decision. The main reasons for this difficulty are:

  • the Romanian road law specifies the "Express" class of roads which have a higher speed limit and should be in better shape than national roads
  • European and Express roads have a higher speed limit outside of inhabited areas than the National roads
  • poor state of the existing infrastructure
  • European roads are usually only national roads with a total of 2 lanes, sometimes in a marginally better shape than the other national roads
  • 4 lanes roads are quite seldom and only a total of about 250km of motorway are present in the road network (at this date Feb. 2009)

Because of these reasons several proposals to use the 'trunk' value have appeared.

  • reserve 'trunk' for express roads only/do not use 'trunk' at all (since we don't have any Express roads in Romania)
    • pros:
      • one-to-one correspondence between road category and tag values in OSM
    • cons:
      • the 'trunk' value is wasted/reserved, even if is highly unlikely that Express roads will ever be built in Romania
      • European corridors are not visible
      • Romania's road network is visible only at high zoom values
    • supporters: alex-map
  • use 'trunk' only for national/European roads/segments with a total of at least 4 lanes (2 lanes per direction, even if is in some cases the second lane is narrow)
    • pros:
      • roads in better shape (larger roads) are more visible
      • higher added value for the user - a 'trunk' road would automatically mean a better one
      • better equivalence with external roads and classification (since trunk roads outside Romania would be better than primary ones)
      • routing algorithms would prefer such roads to others in worse shape, making it more likely to obtain a better routing algorithm for driving
      • real world conditions are clearly represented on the map
      • other parts of the OSM map use the real world condition of the road for road tagging (Spain, France)
      • since only some European national roads have >=4 lanes, it would be clear that the higher external speed limit (100km/h) applies and can practically be obtained
      • improved time estimates in GPS units' routing algorithms (see the previous point)
    • cons:
      • not all European corridors are visible
      • for roads with frequent 2/4 lanes alternations, the map would look odd (although there are such cases in other countries, too)
      • will not show the higher speed limit (which usually translates in higher average speed) for the full extent of the (european) road
    • supporters: Günter, Thanas, Marinel, RobiNet
  • tag all European roads, no matter the quality or the number of lanes
    • pros:
      • all European corridors are clearly visible
      • higher speed limit from the national roads is visible
      • most of the european roads are in better shape than the national roads
      • will be aligned with tagging at international level, where the current approach is to clearly show the national infrastructure
    • cons:
      • sometimes misleading, depending on the area, the state of these roads may vary (poor shape/very good shape, 2 lanes/4 lanes)
      • misleading, routing algorithms would prefer either of the roads part of European corridors, even if users generally prefer the ones in better shape
      • the time estimates in GPS units can be easily misleading/wrong since high average speeds on 2 lanes roads would be unattainable
    • supporters: Octavian Chelu, Max, Sorin, Cristian Draghici, Somebody902, Ciprian, EddyP
  • abstain from voting
    • supporters:

Please add more pro/cons to the existing ones.