Proposal:More road details

More road details
Proposal status:	Draft (under way)
Proposed by:	Kovposch
Draft started:	2023-06-28

Proposal

More road types by adding to details without affecting existing tagging.

Rationale

Functional classification rationale

• service=driveway is often debated, and service=driveway2 are highly controversial
• service=parking_aisle is commonly misused for all roads in a carpark
• service=alley is confusingly used for narrow roads
• highway=service in bus terminals or interchanges, and taxi stands are not distinguished
• There is no highway=*_link counterpart in highway=residential , highway=unclassified , and highway=service .
• service=* may be interpreted as a less important highway=service than those without

Parts rationale

• side_road=* is confusing (common word for any minor road intersecting a major road) and unclear against frontage_road=* , and the road can't be shown as having them explicitly
• No tagging for local-express lanes, causing roles to be abused for freeform text
  • as lengthy as westbound_express_lanes 1248024 1248024 (other issues not discussed)
• modifier=* exists for different derived numbered route=road . But branches in the same route=road can't be shown.
  • Eg M25 spurs only have carriageway_ref=* , and exist as an unsupported link in the route=road 106164 106164

Layout rationale

• The counting of lanes=* is often unclear and debated, when there are obstructions (eg parking) or deviations (eg very wide or narrow road) causing discrepancy between number of lanes officially and practically

Greening rationale

• It's not possible to a road with tree_lined=* has separately drawn natural=tree_row or natural=wood yet.
• Although natural=wood is mentioned in Key:denotation for drawing natural=tree, the fate of denotation=* is not mentioned yet.
• denotation=avenue is unclear on other situations involving trees on roads, especially high-speed roads that may not be seen as "avenue", and trees at intersections and interchanges.

Street furniture rationale

• insulation=* has bad semantics on whether something is noise-insulating, or has noise insulation.
• The side of noise protection isn't indicated.
• No solution for wind barriers, only some uses for windbreaks. However, that term is specifically for farm fields. It is inappropriate for trees elsewhere.
• No solution for headlight glare barriers.
• No solution of transparency in barriers

Traffic control

• restriction=no_u_turn can't be applied to a section of a road that bans u-turn over the entire length. Can only be done at each junction, and for every section in between with same from + via + to member.
  • restriction=no_u_turn has already been somewhat used on lines. Should be allowed.
  • u_turn=* is unclear. It doesn't warrant a new when restriction=* is expandable.

Tagging

Functional classification

• service=*
  • service=alley (for the original meaning) → service=rear_access
  • service=parking : Unspecified/generic/general road in a carpark (may be used when undetermined, or unfitting otherwise)
  • service=station : Unspecified/generic/general road in a amenity=bus_station (may be used when undetermined, or unfitting otherwise)
  • service=station_aisle : Roads for bus berths and taxi stands
  • service=police_observation : Police observation point/platform or stub roads for traffic violation enforcement, or incident management (often raised, or recessed)

• service=* / service_access=* / usage=* (TBD) : While service=* may be interpreted as the type of highway=service This may be used to avoid any interference of service=* in the less important meaning
  • *=site_access (TBC)
  • *=parking_access : Road accessing and for circulation between service=parking_aisle in a carpark (can still have parking spots, but not the main function)
  • *=station_access : Roads accessing and for circulation inside a amenity=bus_station

Parts

• usage=* : The function in the street network
  • usage=link : highway=*_link counterpart for highway=residential , highway=unclassified , and highway=service
  • service=alley (for the co-opted meaning of a road narrower than most highway=residential ) → usage=alley
  • usage=local : More "local" non-residential highway=unclassified that are less important, in lieu of Proposal:Highway=quaternary
• carriageway:usage=* : The different functions of paralleling carriageways on the same road
  • carriageway:usage=main : Main roadway/carriageway of a road
  • side_road=* → carriageway:usage=frontage : Frontage lanes with only highway=service connections
  • carriageway:usage=collector : Frontage lanes with minor road connections, and local lanes of local-express system ( usage=local not used for clarity, inferior to the term collector-distributor lanes)
  • carriageway:usage=express : Express lanes of local-express system, or managed lanes (HOV, HOT, ETL) focusing on its functionality
• route_usage=* : The function on this branch of a route, where a different number isn't assigned
  • route_usage=main
  • route_usage=bypass
  • route_usage=bypassed
  • route_usage=spur
  • route_usage=connector
• route=road : The above can be further proposed as new role=* similar to Roles for recreational route relations
  • main
  • frontage
  • collector
  • express
  • bypass
  • bypassed
  • spur
  • connector
• direction:ref=* (Similar format to level:ref=* ): To replace azimuth role=* , and to supplement carriageway_ref=* to relate multiple carriageways in the same direction

Layout

• lanes:marked=* (the marked lanes) / lanes:unmarked=* (unmarked usage, both this and lane_markings=* started to be used in 2019-06)

• lane_markings=* : Used for additional devices to line markings (see Proposal:Roundabout details for junctions ; marking=* for edge lines)
  • lane_markings=botts_only : Botts' dots only (exception to definition)
  • lane_markings=botts : Botts' dots added to non-edge lines
  • lane_markings=rumble_strip (to follow traffic_calming=rumble_strip ) : Non-edge lines, markings with raised profile lines, usually centre line
  • lane_markings=raised : Raised maker (studs)
  • lane_markings=reflective : Raised reflective makers (eg Cat's Eye)

Greening

• tree_lined:side: Similar to sidewalk:side .
  • tree_lined:*=separate: Similar to sidewalk:*=separate .

• denotation=* : To be allowed on natural=wood areas
  • denotation=junction : Less significant alternative to denotation=landmark at intersections and interchanges
  • denotation=highway : For roads not quite fitting denotation=avenue

Street furniture

• insulated:side (adopted and extended): Used on the highway=* road. Unchanged on electrical lines, as they are the same feature. Similar to tree_lined:side and sidewalk:side
  • insulated:*=sound
  • insulated:*=wind
  • insulated:*=glare
  • insulated:*=not_required : No noise sensitive receiver, glare, or wind on that side
  • insulated:*=separate: When separately drawn. Similar to sidewalk:*=separate and tree_lined:*=separate use.

• covered:insulated=* : For the top

• insulation=* (partially redefined) : Used on the barrier=* or building=* (especially building=roof ) providing the protection. Can also be used on natural=* for natural=tree , natural=tree_row , and natural=wood for noise buffers and windbreaks.
  • windbreak=* → insulation=wind
  • insulation=glare

• transparent=* (in use)
  • transparent=yes : Some unspecified transparency
  • transparent=full : Full transparency, clearly seen through
  • transparent=semi : semi-transparent
  • transparent=limited : Little transparency

• covered:transparent=* : For the building=roof

Traffic control

• restriction=no_u_turn : To be allowed on lines
• type=restriction : Alternatively or complementarily, section (based on Template:Type ) to be added to support restriction=no_u_turn on a length of road

Examples

Parts example

• M25 spurs
  • highway=motorway
  • route_usage=spur / spur (They are not in a route=road with modifier=spur ! )
• E1A Shin-Tomei, Shin-Meishin connection routes (Shimizu, Inasa, Kameyama, Otsu)
  • highway=motorway
  • route_usage=connector / connector

Traffic control examples

• https://www.dreamstime.com/stock-photos-no-u-turn-sign-image1941683 (extent is shown by "End" supplementary plate below the last sign, and confirmed by repeater signs in between)
  • highway=*
  • restriction=no_u_turn
  • change=* (Isn't necessarily change=no )

Features/Pages affected

• Created
  • *=*
• Modified
  • service=*
  • highway=residential , highway=unclassified , and highway=service
  • tree_lined=*
  • denotation=*
  • restriction=no_u_turn
• Deprecated
  • side_road=*
  • windbreak=*
  • u_turn=*
  • service=alley

External discussions

Others

• Talk:Tag:service=driveway#Removal on restrictions on service=driveway tagging
• Talk:Key:service#parking but no aisle
• Proposal:Service=parking
• service=parking_access https://lists.openstreetmap.org/pipermail/tagging/2016-March/028982.html
• Proposal:U-turn

Comments

Please comment on the discussion page.