segment

`segment`

description A portion of a link defined by link_id,ref_node_id, start_lr, and end_lr. Values in the segment will override they value specified in the link table. When one segment is fully contained within another, its value prevails.
path segment.csv
schema
- missingValues ['NaN', '']
- primaryKey ['segment_id']
- foreignKeys
- [1]
  - fields ['link_id']
  - reference
  - resource link
  - fields ['link_id']
- [2]
  - fields ['ref_node_id']
  - reference
  - resource node
  - fields ['node_id']
- fieldsMatch subset

name	type	description	constraints	warnings	categories
segment_id	any	Primary key.	{'required': True}
link_id	any	Required. Foreign key to road_links. The link that the segment is located on.	{'required': True}
ref_node_id	any	Required. Foreign key to node where distance is 0.	{'required': True}
start_lr	number	Required. Distance from `ref_node_id` in short_length units.	{'required': True, 'minimum': 0}
end_lr	number	Required. Distance from `ref_node_id`in short_length units.	{'required': True, 'minimum': 0}
grade	number	% grade, negative is downhill	{'maximum': 100, 'minimum': -100}	{'maximum': 25, 'minimum': -25}
capacity	number	Optional. Saturation capacity (pce/hr/ln)	{'minimum': 0}
free_speed	number	Optional. Free flow speed, units defined by config file	{'minimum': 0, 'maximum': 200}	{'minimum': 1, 'maximum': 120}
lanes	integer	Optional. Number of lanes in the direction of travel (must be consistent with link lanes + lanes added).
l_lanes_added	integer	Optional. # of lanes added on the left of the road link (negative indicates a lane drop).
r_lanes_added	integer	Optional. # of lanes added on the right of the road link (negative indicates a lane drop).
bike_facility	string	Optional. Types of bicycle accommodation based on the National Bikeway Network Data Template (Table 1-A at https://nmtdev.ornl.gov/assets/templates/NBN_DataTemplates_final.pdf)			['unseparated bike lane', 'buffered bike lane', 'separated bike lane', 'counter-flow bike lane', 'paved shoulder', 'shared lane', 'shared use path', 'off-road unpaved trail', 'other', 'none']
ped_facility	string	Optional. Type of pedestrian accommodation:unknown,none,shoulder,sidewalk,offstreet_path.			['unknown', 'none', 'shoulder', 'sidewalk', 'offstreet_path']
parking	string	Optional. Type of parking: unknown,none,shoulder,sidewalk,offstreet_path.			['unknown', 'none', 'shoulder', 'sidewalk', 'offstreet_path']
allowed_uses	string	Optional. Set of allowed uses that should appear in either the use_definition or use_group tables; comma-separated.
toll	number	Optional. Toll on the segment, in currency units.
jurisdiction	string	Optional. Optional. Owner/operator of the segment.
row_width	number	Optional. Width (short_length units) of the entire right-of-way (both directions).	{'minimum': 0}	{'minimum': 10}