Barriers

Feature page: Barriers

Description

Used for describe various forms of barrier, including walls, fences and gate.

Tags

Physical barriers to all types of "beings" such as vehicles, humans or animals. Not only impediments to a given "way", but also to free movements such as a walk (not following a path) in the countryside. Note that there are two main types of barriers: Linear and Node. There is also an ITO Map layer to help track, and validate, barrier tags in OpenStreetMap.

Contents 1 How to tag 1.1 Linear barriers 1.2 Node barriers 1.2.1 Usage notes for barrier nodes 2 Related tags 3 Examples 4 See also 5 to-dos

How to tag

Linear barriers

• 1 barrier=bollard.
• 2 barrier=hedge.
• 3 barrier=fence.
• 4 barrier=wall.

sided barriers:

• 5 barrier=retaining_wall. Behaves same as natural=cliff, that is no crossing as left-right are different height.
  Lower side on right side of way direction, marked with dots.
• 6 barrier=city_wall. Behaves same as natural=cliff, that is no crossing as left-right are different height.
  Lower side on right side of way direction, marked with dots.
• 7 barrier=city_wall / two_sided=yes. Both sides same height, marked with dots on both sides.

comments
When a linear barrier crosses a way they share a node. Always tag this node with the proper node barrier tag.
If it is just a "hole" with no limitations on the way then tag it as: barrier=entrance. e.g.:
· Two different ways coming to ends on each side are assumed to not form an entrance, so intersection node needs a tag.
· There is a "hole" in a linear barrier but no way is crossing then tag it the same way.
· The "hole" is big enough then make different linear barriers.

height=* can be used as attribute of linear barriers eg. barrier=wall height=3 ft or barrier=wall height=1 m

Node barriers

Node barriers are placed on ways, either highway or linear barriers.

barrier=* (free-form). see possible values to match spelling and avoid duplicating tags for same node barrier.

Possible render for types of node barriers:

1 barrier=block 2 barrier=bollard 3 barrier=bus_trap 4 barrier=cattle_grid 5 barrier=drawbridge

6 barrier=* 7 barrier=gate 8 barrier=bump_gate 9 barrier=hampshire_gate 10 barrier=kissing_gate

11 barrier=lift_gate 12 barrier=portcullis 13 barrier=sally_port 14 barrier=spikes 15 barrier=stile

16 barrier=entrance 17 barrier=chain 18 barrier=turnstile 19 barrier=kent_carriage_gap

Usage notes for barrier nodes

• Use access=* to tag who can pass the node
• Do not place a barrier node at a highway intersection
  • place it on a highway alone
  • or at the common node between a linear barrier and the way (if it's part of both)

• Example in JOSM editor:
• 

  Correct: gate near the intersection of a path (dotted green) and a highway (grey).

• 

  Correct: gate on the intersection of a path (dotted green) and a wall (yellow).

• 

  Incorrect: gate on the intersection of a path (dotted green) and a highway (grey).

Related tags

• access=*
• wheelchair=yes/no/limited
• operator=*
• height=*

Depending on the point of view same thing can be barrier or traffic calming, so there can be overlapping tags.

• traffic_calming=*

barrier type tags discussion.

Examples

A bollard which allows bicycles and pedestrians:

barrier=bollard,bicycle=yes,foot=yes

A one-way exit

barrier=spikes,foot=yes,oneway=yes

An operator=* tag may be used to indicate who operates the barrier (e.g. who has keys to a locked gate)

See also

• Approved_features/barriers > there is + info and wiki links to most of shown values.
• Taginfo (highway=gate)
• traffic_calming=*
• highway=crossing
• embankment=*
• Proposed_features/New_barrier_types a list of additional barrier features, approved by voting, contains also suggestions for access-control like RFID

to-dos

1. Make renderers support barrier=*
   • Osmarender supports: barrier=gate; barrier=lift_gate; barrier=cycle_barrier; barrier=bollard; barrier=fence; barrier=wall; barrier=retaining_wall; barrier=hedge
   • Mapnik supports: barrier=bollard; barrier=fence; barrier=gate; barrier=hedge; barrier=retaining_wall; barrier=wall
2. Make editors support barrier=*
   • JOSM supports main barriers
3. Make routing engines support barrier=* (already a WIP for Traveling Salesman)
4. Add a photo for each type of gate